Some statistics as on Dec 31st 2006
Total Pictures : 170.026
Total Sols : 2110 (11.7 times more than scheduled)
Pics/Sol/Rover : 81
Total distance : 16.684 meters (13.9 times more than scheduled)
meter/Sol/Rover : 7.9
Cost/sol (Assuming 800 millions USD) : 379.147 USD
Post/UMSF’ers/Sol/Rover :
Interesting... the MERs are about 200 sols from individually equaling the time the Viking 2 lander remained operational, and the total number of sols for both rovers is about 200 sols short of the time the Viking 1 lander was operational.
In about 700 sols or so, if the rovers last that long, they will have equaled the total operational time of both Viking landers.
Pretty durned impressive for solar-powered wheeled vehicles...
-the other Doug
After all the extensions - it's more like $900m I think.
Doug
Thanks for the update on image statistics, Climber (about Excel file, pls could you better explain the meaning of the plots? what do we see on horizontal axis?).
Now is time to update also my odometry statistics (same scale):
Getting close to yet more milestones!
If my excel file is working as it should work, I calculated that, tomorrow, june 16th we'll have accumulated 2500 Earth days on Mars while 2500 Sols will be on July 20th which could be more or less when Spirit will have shot 100.000 pictures.
On june 18th, the difference of minutes between Earth and Mars since Spirit landing will be 50.000 (nearly 35 days).
More?
OK : since end of May, the total cumulated distance is over 18 kms, i.e. 30 times what has been scheduled.
Not that far from their second Martian Birthday either.
Doug
Yep, not that far!
September 29th for Spirit and October 9th for Oppy
Regarding the difference between sols and days :we have a 10 Million $ positive difference if we calculate the cost (per sol or day) in Earth days... which seams fair to me since, if we use "external references" it could be VERY expensive to land on Venus and very cheap on Jupiter!
If only we could get humans to Mars for only $400,000 per day! What a bargain, especially in light of a weeklong trip to LEO costing the tourists $20,000,000.
Spirit just reached Sol1400, which is the limit for my last odometry plot, so enjoy this last update with old scale...
In truth the operating costs have climbed as well. As I recall the $900 million was as of launch time including normal mission support. To get a true figure we need to add up the costs of all the mission extensions and also the DSN time, if that is not part of those extended mission costs.
$850m was that figure - I just added the $50m as an estimate of the extensions to make $900m
Doug
Well however we slice it, they've been a great bargain.
Talking about MER statistics, anyone know where to find a high resolution version of this MER 1000 sols logo?
Some statistics as on jan 31st 2008
Total Pictures : 207.000
Total Sols : 2880 (16 times more than scheduled)
Pics/Sol/Rover : 72
Total distance : 19200 m (~12 Miles) (16 times more than scheduled)
meter/Sol/Rover : 6.6
Cost/sol (Assuming 900 millions USD) : 315.000 USD
Oppy's now over 100.000 pictures
Just think of this : 72 pictures/Sol/Rover represent 2 old roll films per sol/rover
I can't imagine the size of the container (not talking about processing) the rovers would have to have carryied if Digital camera would'nt exit yet !
Another update for our poor old friends on Mars...
Thanks Dilo. I like the abrv months in Italian
Let see what happen this month with Euro 2008 (BTW my father was born in Piacenza anyway)
Merci, climber... are you referring to UEFA Championship??? If so, I'm not very expert of soccer, sorry!
No major odometry changes, for the moments... so I report only updated pics plot:
Here is the updated .xls file I use to follow Rovers progress.
I've got some reliable infos regarding restricted sols so, I added a column for Oppy to show where they'll be. Please don't take this for granted since it depends on when the downlinks happens and it'll have to be ajusted as we go. Anyway, it should work at least for the coming month or so.
Rovers_follow_up.xls ( 556.5K )
: 1625
Enjoy
Thanks Climber, interesting file.
I would like to integrate these data with my datasheet.
In the meantime, this is my updated odometry for Opportunity ... I hope to see a strong increase of such statistics in next week!
Oppy get full lead now:
+ Oppy overtook Spirit for total distance on March 19 th 2006 : 6836m vs 6807m
+ Oppy overtook Spirit for total number of pictures on October 8 th 2008 : 110864 vs 110840
Edited: for a 900M$ basis, cost per second will drop down 3$ on december 2nd.
I guess we're actually over 900M$. Doug, any better estimate for, say, 31 december 2008?
Conjunction is coming up on December 6. How long will the communications be disrupted around this date.
Last one last 2 weeks total but I'll say it depends on the actual geometry, i.e. how close to the sun Mars will be seen from the Earth. Anyway, I don't expect more than 2 weeks really.
Longest single-sol drive distances:
Opportunity:
Sol 410 = 220 meters (722 feet)
Sol 362 = 157 meters (512 feet)
Sol 1663 = 153 meters (500 feet)
Spirit:
Sol 125 = 124 meters (409 feet)
There are several drives between your first and second place distances there.
Opportunity:
Sol 410 = 220 meters
Sol 1690 = 216 meters
Time to update Oppy Odometry:
What would their Martian third birthday's be?
On dec 2nd, assuming total mission costs at 900M*, cost per second will be exactly = 3$
Just about that time, total pictures will be very close to 225.000 (source JPL MER web site), giving a cost per picture of 4000$ (again at 900M*)
Note that, removing sundial pics out of the count will increase considerably the cost per "regular" pictures
*: that was your estimation Doug, one year ago, so it's probably "a bit" more. So, if not on dec 2nd, those stats will be moved a few days, roughly... up to their birthday.
My $900m is, I think, slightly high. Scott mentioned something like $890 or there abouts in his awesome Mars 3.0 talk at Gnomedex
Does anyone have an exact date for when the MER combined mission duration becomes greater then the Viking combined mission duration? My rough calculations put it at Dec 29; but maybe some with more precise numbers can get a more exact date.
Reading Scott Maxwell "deary", I realise that he was assuming a cost of 4M$ a day. He didn't know it was 250.000$ a day actualy.
I hope to update this amount in the future and be as wrong as Scott was
Checking the rovers mileage, I can tell that Oppy is ~250m short of having roved twice as much as Spirit.
Another 3-4 drive.
From TPS monthly report:"“We have some commands that have minimum and maximum time ranges in them and the maximum range was January 1, 2010,” she informed. “Obviously, we're coming up on that, so R9.3 extends the maximum range, to noon on January 1, 2020. If we are still going after that,we'll need to do another software patch." The new, R9.3 software has been working “just fine” on both rovers, she added."
This will be Sol 5679 for Spirit
Time for a general update!
Oh, go ahead and connect the dots on that second one...want to better visualize that power spike by Spirit!
June 24th 2009 doesn't seams to be a special day for Spirit. It is indeed.
It'll be Sol 1946...which will also be (Earth) Day 2000 since landing.
Update on pictures and Whrs:
Thanks Dilo,
I love your date setting in Italian....
It almost looks like some cosmic joker's sending us a message via Spirit's power curve
I'm still waiting for someone on UMSF to put together a graph in anaglyph form. I'm surprised we don't see more of that sort of thing.
Other milestones,
Last Oppy drive put the total odometer for both MER above 25 kilometers. (24969 + (~) 70m
Also,
On 09/09/09 (or so ), total number of pictures reached 250.000.
This is ~62 pictures per sol and per Rover or 3600$ per picture... if all costs have ever to be considered for taking pictures only.
Last 25.000 pictures have been shot in 251 sols.
of the 250,000 images:
...109,689 were of the sun dial
...132,275 were of the sun
That's a surprize. That only leaves about 10 000 images not of the sun or sundial! And a lot of those must be navcam odometry frames - I wonder how many?
I think PDP8E was being sarcastic.
hey doug,
guilty...
Thanks for clarifying that, PDP! It would be interesting though to know how many frames have been sundial/sun/odometry. I could imagine writing a script that jumps through the jpl jpeg pages and counts them up. (Not downloading each image, of course.) Odometry would be easy - just add up the navcam subframes downsampled frames (match "EDN" in filename). Sun/sundial could be done by matching on the img width and height attributes...
We all know that odometry means weels turn and not real kilometers and that the sun dials can't be stealed by the Martians without been seen since they are shot so many times . Well, I didn't ear that the MER sun pictures are used by Soho's team either.
Anyway I like the milestone 25 kilometres, 250.000 pictures, 4000 sols, 6 martian years coming along nearly altogether at the same time.
The more I think about it the more useful it would be to do a thorough count of images. One other use would be to find all the images that appear on exploratorium but not on the jpl gallery pages. Has anyone else noticed that there are images missing from the jpl pages? For example, these images are not on the jpl pages:
http://qt.exploratorium.edu/mars/opportunity/navcam/2009-08-09/1N302275829EFFA5ARP1979R0M1.JPG
http://qt.exploratorium.edu/mars/opportunity/pancam/2009-08-11/1P303245951EFFA5B8P2544L7M1.JPG
http://qt.exploratorium.edu/mars/spirit/forward_hazcam/2009-08-09/2F303035468EFFB1E5P1110L0M1.JPG
http://qt.exploratorium.edu/mars/spirit/pancam/2009-08-09/2P303034007ESFB1E5P2550L7M1.JPG
(these are from sols 1961 and 1972 (Oppy) and 1990 (Spirit)).
These were all released on August 9th and 11th on exploratorium, but never made it to the jpl gallery, obviously because of some glitch (August 10th images are missing too). But it would be good to have a list of all such missing gallery images, even though the images are public at exploratorium. The jpl gallery is a great, easy way to look for old images from some particular sol.
I figured I'd check the stats myself. This is based on images downlinked, excluding multiple versions, and doesn't rely on the image browsing sites, but I cannot vouch for absolute completeness. I also am ignoring thumbnails and looking only at the EFF, ESF, and EDN types. I see a total of 120,604 Spirit images, 124,728 Opportunity images, for 245k images. That adds up to 261 Gbits (2.5% of which is from thumbnails and engineering/calibration data) as downlinked. Image number by camera (A/B) is: Pancam 78,929/80,972; MI 5,824/5,996; engineering--the rest. Among Pancam, 8,806/13,298 are of the Sun or sky; 16,482/15,739 are of the cal targets (aka sundial). Those two categories add up to <4% of total Pancam bits downlinked. The rovers have taken over 300,000 images (147,166/160,573); the difference between these numbers and the first set comes from images taken but deleted on board (e.g., some empty dust devil movies) or taken only in thumbnail form (or maybe some missed in my count?). By type, Pancam images are mostly EFF or ESF (like Sun and sundial), MI are almost all EFF, and engineering images are mostly EFF or EDN (like autonav).
* The numbers are as of mid-day (UTC) 15 Sept. 2009 (probably sols 2026/2006 PM downlink).
[edit: fixed Mbits to Gbits. What's 3 orders of magnitude among friends...]
Hey Deimos,
I was finishing up my lunch and doodling how to approach an Exploratorium count with a perl and shell script when your posting came across the wires! Thanks for the independent numbers. You rock!
Agreed, very cool to have those numbers, thanks Deimos. Roughly a third of all pancam frames are sun/sky/sundial. (Should the total volume be perhaps Gbits rather than Mbits?)
With this latest week of drives, the combined driving distance of Spirit and Opportunity is now 26.62 km which beats the Apollo 16 rover driving distance of 26.55 km.
Just for reference:
Vehical / Distance
Lunokhod 2 / 37.00 km
Apollo 17 rover / 35.89 km
Apollo 15 rover / 27.76 km
Apollo 16 rover / 26.55 km
Opportunity (2056) / 18.89 km
Lunokhod 1 / 10.50 km
Spirit (2076) / 7.73 km
Sojourner / ?
Interesting figures indeed.
We've now (last status nov 5th) roved 6209m since Victoria which added nearly 50% more odometry since there (started at 12678m).
I believe that Sojourner (the little rover that could...) drove a total distance of about 110 meters... longest drive during one sol was about 7 meters? How far am I off ?
The total distance will never be known. After Pathfinder died, contact between Sojourner and Pathfinder ceased. Sojourner was programmed such that if this ever happened (like if Sojourner wandered behind a rock or something), to circle Pathfinder, trying to establish contact. This would continue until either Sojourner re-established contact, or died.
Pathfinder died, so contact was probably never re-established. Sojourner spent the rest of its days, unattended to by anyone or anything, circling its lifeless companion, trying desperately to contact it. All in vain.
Actually - we can be fairly confident about how far Sojourner got after pathfinder died, as there's a fairly convincing identification via HiRISE of Sojourners location. We had an entire thread here about it- a pool of where we thought Sojourner would be
Sojourner has been found? I thought its location remained unknown =o. Apparently I didn't keep up with it.
And how did you resolve the issue of not knowing how many times Sojourner circled Pathfinder?
It's fairly clear from the location that it drove from its last know position, in a straight line partially back towards the lander, and stopped.
In a perfect world - it would have circled the lander. But the pathfinder landing site was far from a perfect world.
post 70+ in this thread - http://www.unmannedspaceflight.com/index.php?showtopic=3587&hl=sojourner%20hirise&st=60
On november 20th total Sols was 4160.
If one devides 900M$ by 4160x84600 (Number of second per Earth day), he'll find that costs of 1 rover second hit 2.5$.
Nominal mission was above 52$
Keep in mind that the whole 'Bambi circling its dead mother' imagery was always more poetic than predictive. The code said to return to the lander; the result of certain keep-outs was that circling would occur on perfect terrain. But where Sojourner was on sol 83, Ender was on the most likely first direction. That is significant because Ender & Wedge almost ended Sojourner's travels much earlier, with a rover driver threatening to turn off all safety checks and command enough wheel turns to grind the rock to dust if that's what it took to move again. That terrain, the best entrance to the Rock Garden, was nearly non-navigable. An unattended rover with fault protections (tilt, etc) on had zero chance of passage. (My guess in '97 was right against Ender--wouldn't have won the pool, but close.)
Note that Sojourner got stuck somewhere around 6x nominal mission. The response to both Opportunity and Spirit being stuck has been much more cautious, despite being even further "past warranty". I think the real explanation is a somewhat different culture (despite a similar cast & crew); equally, though, it is clear that the MERs each had more future potential from continued roving, compared to Sojourner with the Rock Garden abandoned.
Also, I have 7 m (sol) and 104 m (mission--before the last couple m) for Sojourner.
That's an interesting perspective, Deimos. Would you say this culture change is a result of increased experience (and confidence) with Mars rover operations in general, or increased maturation of the players , or perhaps a liitle of both?
All teasing aside, though, Sojourner was a secondary vehicle with admittedly far less capability then the MERs so its premature loss would not have been the end of the Pathfinder mission, just a degradation. This would probably foster a tendency to take greater risks with it if the potential rewards seemed at all achievable.
Update on pictures and Whrs, in occasion of 6th anniversary:
Spirit is less than one mission duration away from breaking Viking 2 duration of 2245 sols
Fingers crossed.
Fingers crossed?!?
Nah! 90 days will be a piece of cake!
100% agree. What I was thinking was that if she sleeps at that time and dies before spring come, we'll never know if she made it.
But I'm on the optimistic side too; no doubt she'll make it and rove again.
I trust the Sun will look after Spirit
Thanks for those intriguing stats Climber...
3 milestones rounded up at the end of January 2010!
Oppy reaches 12 miles
27 km total for the Rovers
Which is 45 times more than scheduled
Also, there are more than 62 days differences between Sols and Days since landing. Except Scott Maxwell , they all must be happy they did synchronise a while ago
Scott Maxwell Tweeted:
"Below ~140W-hr/sol, we're power-negative & start dipping into batteries. Too many sols at that level & we hibernate. "
Hang in there, gal...
Hoo boy. Deus ex Machina!!!
"Don't bet against Spirit"... <---- good advice, she's a tough one.
@marsroverdriver mentioned that as IIRC, Spirit is down to 133whr as of March 22 (~ sol2210)
Hang in there girl!
If I understand Eduardo's Oppy's route map, on Sol 2188, Oppy reached the most western point of her whole journey... since she'll rove east from now on.
As a coincidence, half a mission ago, on ~sol 1100 she was on her most Eastern point so far, and yes, she's supposed to challenge this very soon.
What about showing your BLACK MAN at Miyamoto for scale, fredk?
I checked out the JPL Rover website on the pictures section: for the first time since landing, Oppy shows more Sols than Spirit: 2209 vs 2208
Sorry I missed this one 2 weeks ago.
On sol 2218, April 21st 2010, Oppy from Victoria surpassed Total Spirit mileage.
On previous drive Total distance was 20385m (source Mer website) and since Oppy left Victoria at 12678m, the traverse was 7707m.
Total for Spirit is 7730m and Oppy sol 2218 was over 60m (source Eduardo's map).
This gives a pretty nice prespective of what has already been accomplished during the traverse.
I think that these numbers aren't quite right. The 12678m figure quoted by climber probably comes from this http://marsrovers.nasa.gov/mission/status_opportunityAll_2008.html#sol1681, but that number corresponds to the odometry at the end of sol 1687. That's several long drives into the journey, which began on sol 1683. The same update notes that Opportunity was already 314 meters along at that point, bringing the total odometry to 8021m as of sol 2218.
Personally I still like to think of the journey as having http://marsrovers.nasa.gov/mission/status_opportunityAll_2008.html#sol1655. My "records" (I use that term loosely) indicate that that would add another 565 meters. Estimating the last three drives at 75 meters combined, said "records" look like this as of today (sol 2238), stage by stage:
Thanks Poolio - I'm more than happy to be corrected!
If we take Duck Bay as the starting point as you suggest, are we still looking at a total journey of 19km or do we have an update on that figure as well?
Neil
I really don't know. I believe that the "official" NASA stance is that the trip to Endeavor started at Cape Agulhas, and the last we've seen from the maps is that the trip from there was estimated at 19km. I'm not suggesting that anyone should adopt my practice of counting from Duck Bay, but if you do, just add another 1/2 km.
Perhaps one of the reasons they stopped putting the bar on the maps is that the total distance is a moving target. Every uncrossable dune and "interesting rock" adds to the total, and it's futile to try and calculate the percentage based on a variable number. So I just like to keep an eye on the horizon and watch the scenery go by.
What I did myself: I used what I thought was the day we left Victoria = on Oct 18th 2008, Sol 1683, at 12678m (and I can't remember now how I "choose" this date) ... and followed this way. I mean, we could discuss departure date but there is no point doing so.
My post was to put Oppy's traverse as a distance perpective to compared to Spirit's.
Of course. Arguing departure date doesn't get us any closer to Endeavour. The point of your post was well taken, but sometimes I can't help being pedantic. This is a "statistics" thread, after all!
fredk: Thanks for the clarification on the maps. I knew that Tim Parker was driving the recent frequency of map updates, but never understood that the other maps were generated outside of JPL (despite the legend), or that we could still expect to see them from time to time.
Now that Opportunity has surpassed Viking 1 in mission duration (longest surface mission) I tried to find some orbital spacecraft for new milestones.
Mission, Orbital Insertion-Mission Ended, Duration, Date Spirit Should Surpass
Galileo, 12/07/1995-09/21/2003, 2846 days, 10/19/2011
MGS, 09/11/1997-11/05/2006, 3343 days, 02/27/2013
PV*, 12/04/1978-10/08/1992, 5058 days, 11/08/2017
*Pioneer Venus
Mars Odyssey and both Voyagers entered operation before MER and hopefully won't be ending for a long, long time.
(All figures are hopefully within a day or two. Feel free to correct me.)
Edit: BTW, Odyssey should be surpassing MGS in "at Mars duration" on December 18th.
Edit Edit: Corrected for VP end of mission date. (Thank you Paolo.)
The upturn in energy for Opportunity is the result of minor panel cleaning events rather than coming out of the winter solstice.
hi Dilo!
Is it possible to post the raw data of your diagrams?
Just to play with it and make some stupid statistics on my own.
thanks,
Moreinput
Sure, this is my updated file in .xls format (original is .ods, but I think is limited in compatibility)- I removed plots-
My monthly update:
Here is a graph showing the weekly values of Opportunity's Watt Hours, Tau, and Dust Factor (as stated in the weekly Opportunity Updates on the main Mars Rover website) from January 2010 to July 15, 2010.
Cool plot, thanks PDP8E!
Thanks Dilo and FredK
I was wondering if Tau was zero and the dust factor was 100% what are the Whrs differences between Winter solstice and Summer solstice. A nice sine function between those points should give you the maximum possible Whrs on any given Martian day (depending on latitude)
That's an interesting question. Presumably it wouldn't be precisely a sinusoid, even if the solar arrays were level. In addition to the varying incidence angle, the total hours that the Sun is up vary with time of year. And the incidence angles in morning and late afternoon are low even when the Sun climbs high at local summer. I'm sure someone has done an accurate calculation...
Some of Helvick's early posts in the old Whrs thread have a max power curve - http://www.unmannedspaceflight.com/index.php?s=&showtopic=2195&view=findpost&p=44840
Remember the days when we thought 400Whrs was needed to do anything, and rover death was at 290?
For baseball nuts who love stats: Considering the 70m restraint vs. now driving three sols in a row, I wonder what distance record Oppy might set for some period of time like 3 or 5 or 10 or 100 sols.
I need to slightly anticipate my monthly update because I could have some connection trouble in the next month due to home transfer...
I love that jump in Oppy's power! There's nothing like seeing it in graphical form. Thanks Dilo.
We'll have confirmation in next week update but we already can say that total odometry Spirit + Oppy reached 30km last night. and still
Hello again!
Usually we are looking for the cool new maps of Tesheiner to follow the journey of the rovers.
But the journey is also a journey through the time. Attached you find the journey through the times since 2003. I made also made a version for the german Wikipedia. Maybe someone find it interesting when we reached which scientific target. If you see some errors in it, please inform me about it.
Best regards,
MoreInput
Neat! One suggestion & a question:
1. "Last message from Spirit" might be better phrased as "Communications hiatus". I'm sure that we haven't heard the last from her yet.
2. Are the winter periods true calendar-derived Martian winters, or just the periods of reduced MER activity due to the season? They seem kind of short to me on the graphic.
Anyhow, very cool- thanks!
Hi Nprev!
1. I changed the "Last message from Spirit". We just hope the best.
2. I just took the winter solstice and marked a 3 (earth) month interval. More in the way that that was a time of reduced activity. But the activity is also much influenced through the dust on the solar panels. So I just changed that in the new time line. Interesting: Spirit and Opportunity just landed at the end of summer on mars. I didn't realized that yet.
2. Are the winter periods true calendar-derived Martian winters, or just the periods of reduced MER activity due to the season? They seem kind of short to me on the graphic.
I also changed the date of depature from Victoria to the 17th October (Sol 1683)
This is a really cool way of looking at the mission timeline, MoreInput.
I like it very much too. Thanks
It's seams incredible to "see" how short the primary mission was.
I'd suggest "Launch" instead of "Start." It's obvious in context, but when I first looked at the timeline I had a brief moment of confusion.
LOVE that, great for a quick-look reminder of major mission milestones.
Assuming Oppy started the traverse from Victoria to Endeavour at an odometry of 12678m (which I believe is right), she is now short of only 30m for having roved 10 kms since she left.
Thanks Dilo.
Anyone else spend a few seconds on the upper-right graph, psychically urging Spirit's power levels to chase Opportunity's glorious upwards track?
Andy
Yeah, it's like a game of cat and tau's!
I thought that a stats post for those of you who love to see the rovers rove might go down well!
It struck me recently when Oppy passed the 23km mark on sol 2355 that she is rapidly heading up towards an average of 10m/sol. This got me thinking when was the last time (if ever) that this was the case.
By my reckoning (and please correct me if I'm wrong) the last time Oppy averaged 10m/sol was all the way back on sol 642 (Nov 13th, 2005) when she finished with 6,424 metres on the clock while she was looking at Antistasi.
Spirit last achieved this feat on sol 416 (Mar 5th, 2005) with 4,161 metres. At this point I believe she was on the top of the Columbia hills (Larry's Lookout) studying a site named Watchtower.
When you consider that even the NASA level 1 target (600m in 90 sols) did not require this workload, when you consider that Oppy is so far "out of warranty" she is now nearly five years older than when she could last claim this average, when you consider all the 1001 other amazing scientific tests she has carried out on top of this driving marathon... well, it makes you think doesn't it?!
Neil
To add to your statements Neil, here are some more informations:
Higher Spirit mean per sol was on Sol 157 June, 12th 2004 roving 21.5m/Sol
Spirit best week ended on Sol 126 May, 7th 2004 roving 86.3m/Sol
Higher Oppy mean per sol was on Sol 438 April, 16th 2005 roving 11.9m/Sol
Oppy best week ended on Sol 415 March, 24th 2005 roving 118m/Sol
On September 14th Oppy mean per sol is 9.8m/Sol (going up) for the whole mission while it's 3.2m/Sol for Spirit (yes, going down)
Now, here is the complete .xls file I use if you want to play around with ...and even fill the gaps I'm too lazy to fill about the begining of the mission.
Statistics_Spirit___Opportunity.xls ( 798.5K )
: 470
Update.
Encouraging trend of daily odometry and energy budget...
Sol 2400 is coming up. Looks to me like the distance travelled from 2300 to 2400 will be greater than for any other 100 sol period, even sol 400 to 500!
sol 437 odometry: 5225m
sol 339 odometry: 2076m (rounded)
total from sol 339 to sol 437: 3149m
3149 m - about the same distance that was driven on 18 February 1973 by Lunokhod 2! Of course a totally different situation, but it really points out the contrast between driving on the Moon and Mars.
Phil
New milestones shortly.
Tomorrow, Spirit will be on Mars since 2500 (Earth) days. So, on Nov 17th both Rovers will reach the 5000 days mark sitting on Mars. I know days means nothing for the Rovers, but it sure means something for us. Also on December 3rd, the difference between days and sols since Spirit landing will reach 100.000 minutes.
The 5000 Sols mark will be reached the day after Oppy will celebrate her 7th years since landing, January 26th 2011.
Another one: as of Nov 2nd 2010, Oppy mean meters per sol is 10.3 (as shown on Dilo's graph above) and increasing very "fast" since she reached 10m by early October.
Tesheiner's Sol 2410 updated map shows a nice left turn. It's fun to be able to see a direction change during a drive sol -- Oppy's covering a lot of ground!
After Climber's observations on odometry speed increase, I decided to amplify the scale of such parameter, in order to better see it. Moreover, I decided to change plots formats in order to make them more readable, using the 2-weeks average system also for pics/day calculations; lines smoothing is also introduced. In all 3 plots, finally, you'll see only Oppotunity data and now the common timeframe is slightly above 1 martian year, in order to appreciate "seasonal" changes:
One milestone that I think may have been missed occured on Oct 27th when Oppy drove (sol 2403).
This drive saw the combined odometry for Spirit and Oppy go over 20 miles.
I'll just say that again. 20 MILES!
Amazing. Awesome. Inspiring.
Neil
Exceptional mid-month update in order to celebrate arrival to Santa Maria... Absolutely impressive level of average odometry in last 6 months (30.7 m/sol) and, especially, in last 2 weeks (67 m/sol)... easy to forecast a little drop in next days dedicated to crater exploration!
Thanks Dilo. How is the daily and weekly odometry compared to the strech from the heat shield to Viking/Voyager craters (around sols 360-460). It would be nice to see if Oppy is actually covering better ground than during those "early" sols.
Good question, akuo!
In the "guiness days" between Heat Shield and Viking-Voyager exploration (about two months) average Odometry was almost 50 m/Sol, with an exceptional week with 136 m/sol (Sol 407-414); this was also the week in which Oppy reached absolute daily record of 220 meters.
However, Oppy never performed so well in a so long continued period like last one. Look at the total Odometry plot below:
Hi akuo and Dilo,
I don't have the exact period but close.
I've got from 360 to 438 = 3024m (then only 330m up to Sol 531) so, this give a mean of 38,77 m per sol
Last 103 sols (2346 to 2449) = 3654m, so it is 35,5 m per sol
Mean per sol since landing day is now 10.8m
Edited 1: with today's data of sol 2449 (very slight change).
Also, a kinda "rush" recentely to get to Santa Maria (mean m/sol)
Edited 2:
Nov 2-10 = 19,0
Nov 10-16 = 19,5
Nov 16-22 = 36,8
Nov 22-30 = 33,9
Nov 30-Dec 8 = 70,8
Dec 8-14 = 62,0
Edited 3: Oppy drove the last 6kms (which is what remains to get to Endeavor) in 239 sols...
Thanks a lot for the whole picture of the journey, dilo!
As we reached another milestone (literally), I updated the milestone timeline.
And here's the combined view: driving and milestones!
At the upper part you see the odometry of opportunity. In the lower part you see a modified timeline with the interesting milestones. It is also marked when the solar conjunctions happend (cyan), and the big sand storm in 2007. Marked in grey is the mars winter.
Interesting would also be the energy production per sol.
Points of interest:
* While inspecting Endurance Opportunity drove not really much.
* The daily average odometry peak until they drove into purgatory dune in 2005. Then the driving was much more carefully...
* Entering and leaving Victoria crater took about one year. But it didn't put really much on the odometry.
* At Erebus there was a problem with the shoulder joint, so Oppy was on hold (End of 2005)
* The solar conjunctions are also times for a stop
* Winter time isn't really much a problem for opportunity
* You can also the the stops for Marquette Island (End 2009) and Conception (Begin 2010)
wow! I guess AUTONAV works!
MoreInput, your "combined view" is great in terms of informations and comprehensibility; if you want, I could periodically send you updated full Odometry and you could integrate milestones...
In the meantime, this is the Oppy update, showing an almost flat odometry in last two weeks (as forecasted):
Update, poor odometry but good picture rate at Santa Maria, even during conjunction...
Monthly Update; the reduced energy availability will affect odometry in the imminent journey resume...
Is the reduced energy because Mars went behind the dark side of the Sun?
(yes folks, I'm kidding...)
Good one!
Phil
nearly a years since last contact.
At 10m/sol, Oppy would only need about 2 million sols to travel the entire circumference, eh?
Edit: about 5,000 earth years. What're the odds? Gotta check the Vegas line on that!
Darn metric system! thanks for the correction
I like this latest update, specially the average m/sol figure.
I have one suggestion / request. This figure, as you say, is an average of two weeks. Due to the "restricted sols" there are periods when they drive once a day and others when that is done once every other day. So, assuming a single and only goal of "driving, driving, driving", this average figure would go up and down depending on the period it is measuring: restricted sols or not. My suggestion is to have a figure based on a e.g. monthly period; I think (but didn't do the math) it would be much more stable.
I'd add one comment about the smooth (spline?) curves interpolating the points. In some cases, the interpolations overshoot and you get what look like too extreme minima or maxima (pics/sol shows this best). I'd generally vote for straight line segments connecting points or no lines at all, just to avoid any biases like that.
Apart from that, I love these monthly updates - thanks for all the work, Dilo!
As element for evaluation, herebelow the updated odometry with 3 different baselines (10, 20 and 37 days):
I think impressive odometry in last 2 weeks deserves a special update:
So, if I'm reading correctly this and the previous graph, these last weeks have the highest average m/sol of the whole mission, right?
Maybe just coincidence, but looking at milestones in Tesheiner's maps Oppy keeps quite stable traverse speed of 1 km / 20 sols.
sol 2552 - 27 km
sol 2572 - 28 km
sol 2592 - 29 km
Yep! Over 52m/Sol since leaving Santa Maria (49 Sols).
Less than 4 kms to go, right?
Spirit number of pictures per sol was 58...while Oppy is now at 58,7...very consistant or coincidence since the places are so differents?
Yes Doug, this is my thinking too but Oppy did essentialy traverses, longer drives, exploring a very different place as compare to Spirit, kind of different mission even if the vehicules are the same. We'd also have to substract sundial and sun pictures to better compare. It'll be interesting to compare with Curiosity
I thik the subtitle of this topic needs amending, as Spirit is now officially dead.
It wasn't when the thread started. Shall we go back through every single thread title and sub title to reflect the now defunct nature of Spirit?
No.
Dilo, I think the legend for the bottom graph should read "Oppy daily odometry (left scale); Oppy total odometry (right scale)".
Thanks for highlight, Gsnorgathon, I just corrected the image.
Half month update, with great Whr increase due to recent cleaning event and steadly high odometry speed!
Hooray for the welcome winds, ( had my fingers crossed )
It's not the wind, it's because of the speed Oppy is driving at the moment!
http://www.youtube.com/watch?v=20Feq_Nt3nM
At some point, Oppy will have descended 100m from its landing place in the trek towards Endeavour crater.
From Emily's chart
it looks like that will happen soon!
According to this http://www.nasaimages.org/luna/servlet/detail/nasaNAS~4~4~18906~123414:-Columbia-Hills--Color-Elevation-Ma, Spirit ascended about (edit) 60 meters from its landing place in its climb up Columbia Hills.
Re: Brellis' diagram in 194 - I can't see the descent into endurance crater. Is that simply because it was pre-MRO and therefore it missed getting mapped? My sense of perspective must have adapted as the rovers showed what they could do, because I never would have thought that the descent into Victoria was vertically greater than Spirit's climb of Huisband Hill either. I must be misinterpreting the graph. Somebody set me straight!
That chart is based on MOLA shot data in the neighbourhood of Oppy's journey. Those data samples fall where they fall - they usually don't fall very close to Oppy's route. That data is pretty sparse on that scale, so presumably no samples hit Endurance. Some samples did hit the interior of the much bigger Victoria. But Oppy only drove into Victoria a small part of the way to the bottom, not nearly as deep as the data point.
Oppy descended about 12m below the rim of the 70m deep Victoria Crater, IIRC.
One of her two major mechanical problems (wheel voltage or arm stiffness, I forget which) precipitated a U-turn.
From wiki, it was the wheel:
Opportunity has been driven backwards since leaving Victoria Crater. Eye ball glance at Google Mars says she's driven about twice as far backwards as she did primarily forward prior to her arrival at Victoria. That's gotta be approaching 20km. Has anyone driven anything that far backwards, anywhere?
Good thing she has eyes on the back of her head!
As nearly a half year is over, I post a new update of the mission timeline.
The sad milestone is that Spirits mission is now over. Hey, it lauchend over 8 years ago (10th June) ... what a time.
For Oppy there are just two points: Leaving Santa Maria after the solar conjunction, and reaching 30 km.
Some facts:
For the first 10 km Opportunity need 1108 (earth) days
For the second 10 km Opportunity needed 1143 days.
And for the third 10 km Opportunity needed just 435 day.
If dilo has time to update the total odometry sheet I will integrate the milestones again.
New update (slightly in advance due to imminent holidays... ):
As dilo so kind to send me the statistics sheet and the odometer plot, I repaint the integrated drive statistics / mission timeline again.
Nothing really new just more km on the odometer.
A neat combo', thank you both.
Evening all,
According to Teshiner (post no. 722 on the 'Post Conjuction thread') Oppy's 5 hour driving marathon is now scheduled for sol 2645.
To break her 6 year old average distance per sol I estimate she will need to cover 156.46 metres during that drive.
Just a reminder (as if one was needed) that this is a machine now in her 30th 90 day phase and her 32nd 1km warranty!
Neil
For those of us of a statistical bent today's drive may be yet another significant one for Opportunity as it might have reached 31,788m on sol 2649. If so, this would see her break the 12m per sol barrier. If not today it would appear to be only a matter of time until she does, but it could be her final barrier.
With Cape York and all the other wonders of Endeavour Crater now approximately only 1.5kms away it would appear unlikely that this record will be greatly extended again before we become engrossed in the scientific investigation of Spirit Point and beyond.
Neil
If Oppy rolls down into Endeavour, she could pick up some speed!
Last updated report gives 11.954 m/sol average (Sol 2647, 31,630.68 m), very close to a new record... in the following week (ending today) we need additional 230 meters only in order to break the old record!
edit: ...and based on last Theseiner's map, Oppy already made a 150m progress from sol 2649 to 2652...
According to my record, the odometer is currently at 31920m; 31630 from the last official report plus 140m on sol 2649 and 149m on sol 2652.
Even if we rely "only" on the Official odometry, on sol 2647 (july 5th 2011) we were at 11.950 m/sol which breaks the old record of 11.924 on sol 438 (april 16th 2005). Anyway Eduardo's figure shows that we are over 12m/sol now. Using this last figure, we are now 350 m short of reaching 40 kms total for Spirit + Opportunity. (or 2545m short of a full Marathon)
Climber, my figures are slightly different about previous record (11.96 m/sol on sol 437 and 12.00 on Sol 442) but, at this point, no doubt it was broken in the last days (12.04 on Sol 2652 based on Theseniner data above). So this is my updated plot:
For Sojourner you can put in approximately 85 m.
Phil
Looking quickly at the route map, it appears Lunokhod 2 reached a point approximately 15 km from its landing site. It drove south, east and north again, with other diversions from its route as well. I'll post a map in a lunar thread.
Phil Stooke
With Phil's help and last Oppy drive, here is the whole figure regarding the 8 planetary rovers.
Actual total roving distance
1. Lunokhod 2 / 37.00 km
2. Apollo 17 rover / 35.89 km
3. Opportunity (2654) / 32.00 km
4. Apollo 15 rover / 27.76 km
5. Apollo 16 rover / 26.55 km
6. Lunokhod 1 / 10.50 km
7. Spirit / 7.73 km
8. Sojourner / 0.085 km
Actual maximum distance from landing base
1. Opportunity (2654) / 18.05 km
2. Lunokhod 2 / 14.39 km
3. Apollo 17 rover / 7.2 km
4. Apollo 15 rover / 5.0 km
5. Apollo 16 rover / 4.6 km
6. Spirit / 3.62 km
7. Lunokhod 1 / 2.26 km
8. Sojourner / 0.01 km
I hope we drive further than the Apollo 17 rover ...
Update (it was a little tricky to find all information on the renewed MER site):
As of July 19th, Spirit + Oppy total > 40 km... AND 25 miles (40.283 and 25.027)
End-of-month update:
The new Dust Factor is a really cool feature! thanks, dilo
Tosol's 2700 for Oppy
She completes her 30th nominal mission.
NASA may need to extend the mission for a 31st.
Started a minute ago.
Yeah!
I think they should change the background now ...
Update:
According to http://www.marsdaily.com/reports/Opportunity_Past_21_Miles_of_Driving!_Will_Spend_Winter_at_Cape_York_999.html, Oppy has passed the 21-mile mark and is close to 34,000 meters.
Actually, she crossed the 34km mark during the last drive on sol 2754.
On nov 12th, Oppy's odometry went from 34200m to 34250m putting her record since Jan 1 st over the 7740m mark which is what her Spirit sister drove in her entire Life.
Also, the total odometry of MER rovers was 42058m on Nov 16th short of 137m from having roved a FULL Marathon!
5000 Sols! Think about it: FIVE-THOUSAND-SOLS.
Oppy's today on sol 2790 and Spirit last call was on sol 2210.
This is quite a milestone.
Ready for the challenge, Curiosity?
Update to Dec,27 (Sol 2817):
This topic seemed to be the best place to slide this in...
I think there is a 'year change' bug on the Mars Rover website. The SOL clock is about 353 days off...
Opportunity is currently at SOL 2821-ish
The SOL clock says 2468
http://marsrover.nasa.gov/home/index.html
Has happened every year (possibly since prime mission) where they have to go in manually and put in an appropriate constant. Usually takes about two weeks. No one working on that site has wanted to rewrite the code that would go out several years in advance--since how probable is that that the rover(s) will really last another year
Get rovers to Mars ... check. Operate them many years past their design life ... check. Write clock software without a Jan 1 bug .. not so much?
The time of sol seems to have been off every time I've been there recently, too. The clock at http://www.lpl.arizona.edu/~lemmon/mars-tau-b.html is accurate. I expect it to not have a leap year bug or anything, but we'll see. (I'll link an MSL clock to the site eventually--sol -210, 20:01:00 as I write, if I've got it right.)
And http://www.greuti.ch/oppy/html/filenames_ltst.htm differs from Deimos's since the first gives local true solar time and the other hybrid local solar time - is that right, Tman? The sun would be due south at noon LTST, is that right?
The Sun crosses the meridian at noon LTST (whether to north or south depends on site and season). The LTB time at the bottom of Tman's page is also accurate for for HLST.
Thanks, Dilo. If you look at the Whr curve, you can see what looks like a jump of roughly 15-20% in power at around sol 2800, which is when we pulled into the north-facing winter haven.
Good catch, Fred. Below a zoomed portion of the plot highlighting the jump and guessing power trend without it:
As Oppy drives over eight years now on Mars, I post the updated timeline of the MER mission now.
As milestones I took Homestake and Greely Haven.
Awesome as usual! A wonderfully succinct summary of two long adventures. A couple of very minor typos: you're missing an 'n' in Endurance, an 'e' in Greeley, and a 'c' in Concepcion.
I really like that too. I didn't read the small print but I notice that this winter looks shorter than previous ones. Is there a reason for that?
Great work, MoreInput!
I integrated your Oppy timeline with my full odometry (implementing Emily's corrections):
wow! That's the most concise telling of her story yet!
Thank dilo, for putting these two diagrams together. So they are now much more informative than they are alone.
I just corrected some errors (typos, length of winter) in the timeline diagram, and marked just the next solar conjunction far away on 18th April 2013.
Update showing recent energy increase due to slight Tau/Dust improvements:
Tomorrow, Spirit will be sitting on the surface of Mars since her landing 3000 Earth days ago. Oppy's coming along.
New update shows a dramatic drop of picture rate (only 2/sol) in the last half-month! I do not have an explaination...
FYI, the data tracking site shows an average of >20 pictures taken and >20 pictures downlinked per sol over the last 15 sols, so the problem may be elsewhere. (The exact number depends on how you define picture--I looked at total EDNs + ESFs + EFFs downlinked; and at ETHs to determine how many images were successfully acquired.)
Deimos, I confirm your figures looking at the picture counts from different cameras; however total counter in the upper portion of the http://marsrovers.jpl.nasa.gov/gallery/all/opportunity.html gave me 166290 pictures on March,17 and 166320 pictures on March,30 and this imply only 2pic/day average! as additional info, this counter wasn't updated for several days before yesterday and, at this point, it seems there are problem with it!
That's not a great place to pull the total number of images taken. That's the number of images taken,downlinked, piped thru the raw processing pipeline and uploaded to the JPL image page.
Energy only update:
Again, a half year is over for this incredible mission. We are 8 and a half year older since landing, and getting day for day new pictures and new views of the Mars surface. Still unbelievable. It feels just so normal to get news from Mars day by day, even if it is extraordinary we don't think about it.
Just a small update from the mission timeline. I corrected the time at Greeley Haven and added the radio science Doppler campaign.
So, Happy 3000 sols, Oppy!
On June 12th 2012, Oppy's sol 2981, the MER rovers completed the first Marathon ever roved on Mars. On that day, before Oppy's drive, total distance was 42190,36m a mere 4,64m short of the 42195m of a Marathon. She then roved another 17m to cross the boundary. For having run such a distance myself, I can tell you it's quite another achievement for our beloved friends.
Congrats to Oppy team for new milestones! And this is the update:
Watching the Curiosity "Dune Buggy" vid got me wondering -- there are lots of examples of wheels spinning in the deep stuff without any actual forward progress. What's the record for a downhill slide by a MER? Could it have happened descending into Victoria Crater?
Fascinating as always, Paolo, thanks. For the record, Santa Caterina was an area on the N rim of Victoria. Was it the approach to Santa Maria where she skidded/slipped?
Opportunity has surpassed 35km of travel - http://www.universetoday.com/97146/opportunity-rover-tops-35-kilometers-of-driving/
Only numbers but well, another achievement: we just passed the 3000 sols after guarenty mark
Monthly update:
The problem could be calibration. We've seen that before. The tau and dust factor values they give need some model of the dust on the pancam lens. They periodically update that model. I'd be surprized if the batteries degraded that quickly, but who knows...
Late Monthly update (purpose is to align it at the change of month, as per MSL):
Half yearly update of the Mars Rover Exploration Rover timeline.
Excellent work
About future energy availability, I made the following plot comparing last daily watt-hours (red points) with corresponding trend in previous martian year, obtained by shifting the date 670 Sol back:
If you look at http://www.lpl.arizona.edu/~lemmon/mars-tau-b.html you'll see that we get basically the same peaks and troughs each year - but there's often a lag early or late depending on how the weather is doing. Regional dust storms I think can bring spikes forward or push them back.
Updated charts:
Updated charts, energy trend decreasing again:
Just for fun and curiosity I'd like to find out what was the Oppy's record in weekly traverse distance - what was the maximum distance trvelled within any 7 following sols.
Do we have somewhere here a list of all sols traveled distances from sol 1 up to tosol?
Can some MER statistics master share such (excel) file with us?
Thanks
It was sometime after leaving Endurance, I recall (sol 400 or so).
See the chart in this post, with the huge spike around that time: http://www.unmannedspaceflight.com/index.php?s=&showtopic=3705&view=findpost&p=85751
Pospa, this is the Top Ten list (Explorer1 demonstrate a good memory!):
Actually, she covered 1.4 km in 10 days! this happened just after a new navigation software was uploaded, around sol375, then Purgatory stall occurred on Sol446. After this tough experience, she never exceeded 100m for a while!
A little late, but here is the time line of Oppys incredible journey until July 2013.
Thanks for timeline, MoreInput!
I integrated it with my updated Opportunity odometry plot (I added also some old daily records previously omitted):
Only one (noteworthy) dust storm in all this time; eventually there will be a global event again right? Hope Oppy fares as well as last time...
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