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dilo
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! rolleyes.gif
akuo
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.
dilo
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:
climber
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...



MoreInput
Thanks a lot for the whole picture of the journey, dilo!

As we reached another milestone (literally), I updated the milestone timeline.
MoreInput
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)



brellis
wow! I guess AUTONAV works!
dilo
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... wink.gif
In the meantime, this is the Oppy update, showing an almost flat odometry in last two weeks (as forecasted):
Click to view attachment
algorimancer
QUOTE (dilo @ Dec 16 2010, 09:09 AM) *
...Odometry plot...


Just to have a bit of fun with bad statistical methodology, here's a 1000 Sol projection based upon and extending from the Sol 1660 to Sol 2440 segment of the graph. The better fit is a cubic polynomial ... very promising, if misleading smile.gif

Click to view attachment
djellison
QUOTE (algorimancer @ Jan 5 2011, 06:24 AM) *
very promising, if misleading


You put the word 'very' infront of the wrong word there.
dilo
Update, poor odometry but good picture rate at Santa Maria, even during conjunction...
dilo
Monthly Update; the reduced energy availability will affect odometry in the imminent journey resume... sad.gif
Click to view attachment
ilbasso
Is the reduced energy because Mars went behind the dark side of the Sun?

(yes folks, I'm kidding...)
Phil Stooke
Good one!

Phil
Sunspot
nearly a years since last contact. sad.gif
dilo
Update...
brellis
At 10m/sol, Oppy would only need about 2 million sols to travel the entire circumference, eh? smile.gif

Edit: about 5,000 earth years. What're the odds? Gotta check the Vegas line on that!
climber
QUOTE (brellis @ May 5 2011, 01:51 AM) *
At 10m/sol, Oppy would only need about 2 million sols to travel the entire circumference, eh? smile.gif

You can take 10% out of this laugh.gif
Global mean as of April 27th 2011 is 11,002 m/ sol (and 2mm a sol x 2 million is to be taken in account wink.gif )
Her best was back on Sol 438 where the mean was then 11,929m/ Sol.
By the way she already drove 3 more kms since Victoria than she drove from Eagle to Victoria (15706m vs 12678m)
brellis
Darn metric system! blink.gif thanks for the correction
dilo
Late Update...

Tesheiner
I like this latest update, specially the average m/sol figure. smile.gif
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.
fredk
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!
dilo
QUOTE (Tesheiner @ May 5 2011, 06:34 PM) *
I like this latest update, specially the average m/sol figure. smile.gif
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.

Thanks Edoardo for suggestion, when I started this activity the two-weeks baseline seemed the best trade-off but I noticed the up-down trend too; now I am seriously considering the possibility to add a monthly baseline...
SteveM
QUOTE (Tesheiner @ May 5 2011, 01:34 PM) *
I like this latest update, specially the average m/sol figure. smile.gif
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.

To refine Edoardo's rough estimate, the exact period you want is 36.378 sols, which equals 37.378 days. To suppress the effect of restricted sols, a 36 day average should do nicely.

dilo
As element for evaluation, herebelow the updated odometry with 3 different baselines (10, 20 and 37 days):
Click to view attachment
Indeed, the last baseline curve seems by far more regular and this could be due to "restricted sols effect" suppression, as suggested by Eduardo and Steve.
This is the Oppy total odometry with 36 sols average distance:
Click to view attachment
I will implement the new baseline, instead of the 15 days one, for speed curve calculation in the next updates.
Thanks for support!
dilo
I think impressive odometry in last 2 weeks deserves a special update:
Tesheiner
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?
pospa
Maybe just coincidence, but looking at milestones in Tesheiner's maps Oppy keeps quite stable traverse speed of 1 km / 20 sols. rolleyes.gif

sol 2552 - 27 km
sol 2572 - 28 km
sol 2592 - 29 km
dilo
QUOTE (Tesheiner @ May 14 2011, 10:40 PM) *
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?

Edoardo, if you look at 2nd plot of t my previous post, a similar avg speed was reached only in the "glorious week" from Sol407 to 414, when Oppy covered almost 1 km, establishing the absolute record of 220 m in a Sol with 64 m/sol peak average on a 36 Sol/day base.
Is great to see again similar average speed after 6 years and additional 21km covered! wheel.gif wheel.gif wheel.gif
climber
Yep! Over 52m/Sol since leaving Santa Maria (49 Sols).
Less than 4 kms to go, right?
climber
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?
djellison
QUOTE (climber @ May 26 2011, 01:52 PM) *
or coincidence since the places are so differents?



What's coincidental about two near identical rovers with identical cameras and identical communications systems taking the same number of images, on average?
climber
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
MahFL
I thik the subtitle of this topic needs amending, as Spirit is now officially dead. sad.gif
djellison
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
Update:
Click to view attachment
Gsnorgathon
Dilo, I think the legend for the bottom graph should read "Oppy daily odometry (left scale); Oppy total odometry (right scale)".
dilo
Thanks for highlight, Gsnorgathon, I just corrected the image.
dilo
Half month update, with great Whr increase due to recent cleaning event and steadly high odometry speed! biggrin.gif
eoincampbell
Hooray for the welcome winds, ( had my fingers crossed smile.gif ) dd.gif
remcook
It's not the wind, it's because of the speed Oppy is driving at the moment! smile.gif
elakdawalla
biggrin.gif
brellis
shake, rattle and roll!
brellis
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! smile.gif
brellis
According to this NASA article, Spirit ascended about (edit) 60 meters from its landing place in its climb up Columbia Hills.
tanjent
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!
fredk
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.
brellis
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:
QUOTE
The rover left the crater interior on sol 1634 (August 29, 2008) after it experienced a current spike similar to the one which preceded the malfunction of twin Spirit's right front wheel.[3] After a partial anti-clockwise circumnavigation, the rover set off towards its next major destination, the crater Endeavour.[9]


Interesting stat from this Science Daily article:

QUOTE
The rim of Victoria Crater is about 30m higher than the rim of Endurance, said Squyres; and as the rover drove south toward Victoria the hematite blueberries in the soil became ever fewer and smaller. Rocks deep inside the crater, however, contained big blueberries indicating that the rocks higher up had less interaction with water and thus the water's source was likely underground.


It wasn't as vertically dramatic as "heading for the Hills", but still...kinda like a roller coaster ride, eh? smile.gif
NW71
QUOTE (climber @ Nov 5 2010, 05:09 PM) *
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.


And so it has continued, despite the fact that we spent a good deal of time shortly after Climber made the above post at Santa Maria crater.

In fact, after today (sol 2635), Oppy has an average of 11.9 metres per sol (31,343 metres). I'll check when this was last the case and get back to you all.

Neil
brellis
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! smile.gif
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