IPB

Welcome Guest ( Log In | Register )

22 Pages V  « < 20 21 22  
Reply to this topicStart new topic
Dust Storm
marsophile
post Oct 19 2018, 01:51 AM
Post #316


Member
***

Group: Members
Posts: 473
Joined: 10-September 08
Member No.: 4338



QUOTE (JRehling @ Oct 18 2018, 07:56 AM) *
In my many winters' experience with snow, and three recent experiences with forest fire ash, the deposition of a windborne, granular substance does not cover all surfaces equally. Maybe Oppy's solar panels accumulate half as much as nearby surface units, maybe twice as much. I don't know how we could know – unless and until Opportunity wakes up and sends us pictures.

The law of averages: an interval around the mean carries the most probability mass. It is true we cannot know in any absolute sense but we can maybe get a likely estimate that could inform the recovery strategy going forward.

With regard to CRISM on Winnemucca:
http://www.planetary.org/explore/space-top...nce-valley.html
QUOTE
Instead, the scientists are examining Winnemucca with ground imagery, remote sensing, and an orbital mineralogical detector.

I assumed the orbital mineralogical detector was CRISM. In any case, it can be imaged by HIRISE, and I think the bright backdrop might provide a convenient "canvas" for viewing the new dust deposit.
Go to the top of the page
 
+Quote Post
James Sorenson
post Oct 19 2018, 05:33 AM
Post #317


Member
***

Group: Members
Posts: 636
Joined: 21-December 07
From: Clatskanie, Oregon
Member No.: 3988



QUOTE (JRehling @ Oct 18 2018, 06:56 AM) *
unless and until Opportunity wakes up and sends us pictures.


I think if that happens, a gust would have blown a vast majority of any fallout off of the panels since Oppy would have woken up and phoned home. We will never really know at leased for sure how much accumulation was really on them in that case or any case.

Oppy did take a pancam color panorama in the weeks on up to the end of science ops. So if the rover does wake up and starts taking pics around the area, change detection could be interesting. Not sure if even that would give an accurate fallout estimate, since winds could have also cleared the area.
Go to the top of the page
 
+Quote Post
marsophile
post Oct 25 2018, 04:18 PM
Post #318


Member
***

Group: Members
Posts: 473
Joined: 10-September 08
Member No.: 4338



https://spacenews.com/nasa-to-soon-end-acti...th-opportunity/
Go to the top of the page
 
+Quote Post
akuo
post Oct 30 2018, 08:17 AM
Post #319


Member
***

Group: Members
Posts: 464
Joined: 24-March 04
From: Finland
Member No.: 63



QUOTE
After a review of the progress of the listening campaign, NASA will continue its current strategy for attempting to make contact with the Opportunity rover for the foreseeable future. Winds could increase in the next few months at Opportunity's location on Mars, resulting in dust being blown off the rover's solar panels. The agency will reassess the situation in the January 2019 time frame.

https://www.jpl.nasa.gov/news/news.php?feature=7227

Cheers to Nasa for continuing the effort!


--------------------
Antti Kuosmanen
Go to the top of the page
 
+Quote Post
marsophile
post Nov 4 2018, 05:50 PM
Post #320


Member
***

Group: Members
Posts: 473
Joined: 10-September 08
Member No.: 4338



Are false locks less likely when COMM sessions are scheduled on a dedicated antenna, rather than in an MSPA group?
Go to the top of the page
 
+Quote Post
djellison
post Nov 5 2018, 04:42 AM
Post #321


Administrator
****

Group: Chairman
Posts: 14142
Joined: 8-February 04
Member No.: 1



There's no difference.
Go to the top of the page
 
+Quote Post
marsophile
post Nov 13 2018, 12:17 AM
Post #322


Member
***

Group: Members
Posts: 473
Joined: 10-September 08
Member No.: 4338



https://mars.nasa.gov/mer/mission/status.html#opportunity

Estimated tau now at 0.8
Go to the top of the page
 
+Quote Post
xflare
post Nov 15 2018, 09:49 PM
Post #323


Member
***

Group: Members
Posts: 239
Joined: 18-June 04
Member No.: 84



Is this thread about to get busy?
Go to the top of the page
 
+Quote Post
Fran Ontanaya
post Nov 15 2018, 10:08 PM
Post #324


Member
***

Group: Members
Posts: 291
Joined: 22-September 08
From: Spain
Member No.: 4350



There's a tweet from Chris G from NASASpaceflight about a 11b/s downlink, but there's been false alarms before from orbiter signals.


--------------------
"I can easily see still in my mind’s-eye the beautiful clusters of these berries as they appeared to me..., when I came upon an undiscovered bed of them... – the rich clusters drooping in the shade there and bluing all the ground" -- Thoreau
Go to the top of the page
 
+Quote Post
marsophile
post Nov 15 2018, 10:58 PM
Post #325


Member
***

Group: Members
Posts: 473
Joined: 10-September 08
Member No.: 4338



Probably a misidentified lock, re-identified later as on Maven.

https://twitter.com/dsn_status/status/1063171515208945664
https://twitter.com/dsn_status/status/1063175195492601857

https://twitter.com/dsn_status/status/1063183283754844161
https://twitter.com/dsn_status/status/1063181601453031427

Go to the top of the page
 
+Quote Post
djellison
post Nov 15 2018, 11:13 PM
Post #326


Administrator
****

Group: Chairman
Posts: 14142
Joined: 8-February 04
Member No.: 1



"Today http://eyes.nasa.gov/dsn/dsn.html showed what looked like a signal from @MarsRovers Opportunity. As much as we'd like to say this was an #OppyPhoneHome moment, further investigation shows these signals were not an Opportunity transmission."

https://twitter.com/NASAJPL/status/1063204394596937728

I'd also refer people back to this : http://www.unmannedspaceflight.com/index.p...st&p=241237
Go to the top of the page
 
+Quote Post
marsophile
post Nov 19 2018, 01:16 AM
Post #327


Member
***

Group: Members
Posts: 473
Joined: 10-September 08
Member No.: 4338



I suspect the Insight spacecraft is close enough to Mars now for its signal to be confused with that of Opportunity. The frequency is not so different. It will be landing soon.
Go to the top of the page
 
+Quote Post
djellison
post Nov 19 2018, 04:24 AM
Post #328


Administrator
****

Group: Chairman
Posts: 14142
Joined: 8-February 04
Member No.: 1



Not really....

From https://deepspace.jpl.nasa.gov/dsndocs/810-005/302/302C.pdf the half power beam width for Xband on the 70M antennas is 0.034 degrees

Using Eyes on the Solar System - currently the InSight-Earth-Mars angle is around 0.56 degrees.

It will drop to 0.1 degrees at about 30 hrs before landing, 0.034 degrees about 10 1/2 hrs before landing,
Go to the top of the page
 
+Quote Post
marsophile
post Dec 4 2018, 02:16 AM
Post #329


Member
***

Group: Members
Posts: 473
Joined: 10-September 08
Member No.: 4338



http://www.planetary.org/explore/space-top...son-begins.html

New MER Update from TPS. It mentions a new hirise image that however has not been released yet. Also a discussion of the MER extension proposal. Apparently there are certain commonalities between the Endeavour and Gale craters.
Go to the top of the page
 
+Quote Post

22 Pages V  « < 20 21 22
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 11th December 2018 - 01:49 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.