IPB

Welcome Guest ( Log In | Register )

21 Pages V  « < 15 16 17 18 19 > »   
Reply to this topicStart new topic
MSL Post First Drive - Intermission, Start of Drive to Glenelg, Intermission between CAP 1B and 2 - Sols 17 through 29
Ant103
post Sep 5 2012, 06:39 PM
Post #241


Senior Member
****

Group: Members
Posts: 1514
Joined: 12-February 06
From: Bergerac - FR
Member No.: 678



A special prod for this panorama smile.gif.

Attached Image


--------------------
Go to the top of the page
 
+Quote Post
elakdawalla
post Sep 5 2012, 06:48 PM
Post #242


Administrator
****

Group: Admin
Posts: 5170
Joined: 4-August 05
From: Pasadena, CA, USA, Earth
Member No.: 454



Folks, I am attempting to very briefly summarize each sol's activities on this page. The mission is getting better at posting frequent brief status reports, but my information for the first part of intermission is pretty sketchy. I'd appreciate it if people could email/PM with any corrections.

Speaking of updates, there's a teleconference planned for tomorrow.


--------------------
My blog - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
Go to the top of the page
 
+Quote Post
RoverDriver
post Sep 5 2012, 07:48 PM
Post #243


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



QUOTE (MahFL @ Sep 5 2012, 02:06 AM) *
I see a dint in a wheel, I wonder if that was upon landing ?Original image


We didn't notice any on the first drive. I actually see a couple of dents.

Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post
djellison
post Sep 5 2012, 07:55 PM
Post #244


Administrator
****

Group: Chairman
Posts: 14210
Joined: 8-February 04
Member No.: 1



Regarding wheel damage....the VSTB (test rover) is effectively 3x too heavy for its wheels....it's eaten its way thru a set already and they've been replaced with an extra beefy set.

There will be dings and dents on the wheels on Mars, but I wouldn't expect anything as bad as is in that video.
Go to the top of the page
 
+Quote Post
jmknapp
post Sep 5 2012, 08:16 PM
Post #245


Senior Member
****

Group: Members
Posts: 1465
Joined: 9-February 04
From: Columbus OH USA
Member No.: 13



QUOTE (mhoward @ Sep 5 2012, 12:15 PM) *
Correcting for the actual camera model will be one of the next things to try smile.gif


Hmmm... seems like some of the panorama-makers here might be doing that--wonder if it's the full CAHVOR model or some approximation, or maybe some canned software.


--------------------
Go to the top of the page
 
+Quote Post
Joffan
post Sep 5 2012, 08:23 PM
Post #246


Member
***

Group: Members
Posts: 178
Joined: 13-September 05
Member No.: 498



QUOTE (djellison @ Sep 5 2012, 01:55 PM) *
Regarding wheel damage....the VSTB (test rover) is effectively 3x too heavy for its wheels....it's eaten its way thru a set already and they've been replaced with an extra beefy set.

There will be dings and dents on the wheels on Mars, but I wouldn't expect anything as bad as is in that video.

I thought that initially too - that the gravity would be relatively high - but isn't the test (driving) rover specially lightened to compensate for that? I'm sure I remember reading that somewhere. It would make sense, especially for slip tests which could be influenced in either direction by not matching the ground force.

My second thought was that the team will always put the test vehicle through much tougher circumstances than they would usually expect for Curiosity herself.
Go to the top of the page
 
+Quote Post
markril
post Sep 5 2012, 08:26 PM
Post #247


Junior Member
**

Group: Members
Posts: 20
Joined: 10-August 12
Member No.: 6526



Here's an interpretation of a MARDI image from sol 25:

Attached Image


Original:

http://mars.jpl.nasa.gov/msl/multimedia/ra...mp;camera=MARDI

Mark
Go to the top of the page
 
+Quote Post
mhoward
post Sep 5 2012, 08:26 PM
Post #248


Senior Member
****

Group: Moderator
Posts: 3431
Joined: 11-August 04
From: USA
Member No.: 98



QUOTE (jmknapp @ Sep 5 2012, 01:16 PM) *
wonder if it's the full CAHVOR model or some approximation


I was referring to the CAHVOR model (CAHVORE for the Hazcams). If CAHVOR is used in any of the off-the-shelf panorama tools I'm not aware of it, although I could be wrong.

Edit: Maybe someone has taken the CAHVOR parameters and worked out parameters that work with the existing mosaicking tools? If so, that would be interesting to hear about. If I've heard about it in the past eight years with MER, I've forgotten.
Go to the top of the page
 
+Quote Post
fredk
post Sep 5 2012, 08:44 PM
Post #249


Senior Member
****

Group: Members
Posts: 3973
Joined: 17-January 05
Member No.: 152



QUOTE (RoverDriver @ Sep 5 2012, 08:48 PM) *
We didn't notice any on the first drive.

But were the parts of the wheels facing down during landing (so perhaps dinged) imaged in the early days? In other words, do you expect to have seen any landing-dings?

Presumably we can check the rotation phase of each wheel in the pre-first-drive images, and figure out whether these dings were facing down during landing...
Go to the top of the page
 
+Quote Post
meraero
post Sep 5 2012, 09:19 PM
Post #250


Newbie
*

Group: Members
Posts: 8
Joined: 12-August 12
Member No.: 6548



QUOTE (djellison @ Sep 5 2012, 02:55 PM) *
Regarding wheel damage....the VSTB (test rover) is effectively 3x too heavy for its wheels....it's eaten its way thru a set already and they've been replaced with an extra beefy set.

There will be dings and dents on the wheels on Mars, but I wouldn't expect anything as bad as is in that video.



No argument here. I just don't ever recall seeing any dings on the earth-bound MER wheels in all of their testing (tread scuffing perhaps). Whether due to scaling effects, wheel design or both, it seems we should expect to see more visible wear on the wheels than any seen on the MER rovers.
Go to the top of the page
 
+Quote Post
djellison
post Sep 5 2012, 09:35 PM
Post #251


Administrator
****

Group: Chairman
Posts: 14210
Joined: 8-February 04
Member No.: 1



QUOTE (Joffan @ Sep 5 2012, 12:23 PM) *
but isn't the test (driving) rover specially lightened to compensate for that?


The Scarecrow rover yes.
http://www.flickr.com/photos/planetaryblog/7197573662/


VSTB, no.
http://photojournal.jpl.nasa.gov/catalog/PIA15876

(Some of my own photos of the VSTB are here : http://dougellison.smugmug.com/Machines/Ma...9&k=ZnpCztC )
Go to the top of the page
 
+Quote Post
RoverDriver
post Sep 5 2012, 10:53 PM
Post #252


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



QUOTE (fredk @ Sep 5 2012, 12:44 PM) *
But were the parts of the wheels facing down during landing (so perhaps dinged) imaged in the early days? In other words, do you expect to have seen any landing-dings?

Presumably we can check the rotation phase of each wheel in the pre-first-drive images, and figure out whether these dings were facing down during landing...


On the first drive we rotated teh wheels 180 deg and took a mid-drive image exactly to inspect the area that was facing downward upon landing. I don't recall seeing any dents.

Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post
ToSeek
post Sep 6 2012, 12:28 AM
Post #253


Member
***

Group: Members
Posts: 128
Joined: 5-May 04
Member No.: 74



QUOTE (Paolo @ Sep 4 2012, 01:42 PM) *
anybody knows whether there are any more teleconf planned? I have checked NASA TV schedules, but I can't find any


Just announced one for tomorrow (Thursday), 10 am PDT, 1 pm EDT: http://www.jpl.nasa.gov/news/news.php?rele...p;msource=12276
Go to the top of the page
 
+Quote Post
Vanden
post Sep 6 2012, 12:33 AM
Post #254


Junior Member
**

Group: Members
Posts: 22
Joined: 9-December 10
Member No.: 5551



I wait for the images (bayer/lossless) without the problem of JPEG compression ...

De-bayer/lossy are very good.
Go to the top of the page
 
+Quote Post
eoincampbell
post Sep 6 2012, 01:41 AM
Post #255


Member
***

Group: Members
Posts: 399
Joined: 28-August 07
From: San Francisco
Member No.: 3511



Those dunes are starting to look majestic, can't wait for a real good view after Glenelg...


--------------------
'She drove until the wheels fell off...'
Go to the top of the page
 
+Quote Post

21 Pages V  « < 15 16 17 18 19 > » 
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 11th July 2020 - 02:39 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.