IPB

Welcome Guest ( Log In | Register )

16 Pages V  « < 14 15 16  
Reply to this topicStart new topic
Chang'e-4 farside landing mission
Phil Stooke
post Jun 13 2019, 08:14 PM
Post #226


Solar System Cartographer
****

Group: Members
Posts: 7906
Joined: 5-April 05
From: Canada
Member No.: 227



Woohoo! (to coin a phrase). Check this out:

https://www.hou.usra.edu/meetings/planetdat...19/pdf/7030.pdf

An abstract for the Planetary Data meeting with a map of Yutu 2's path and other information.

Phil



--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post
Phil Stooke
post Jun 13 2019, 10:59 PM
Post #227


Solar System Cartographer
****

Group: Members
Posts: 7906
Joined: 5-April 05
From: Canada
Member No.: 227



Meeting abstracts are here:

https://www.hou.usra.edu/meetings/planetdat...ram.htm#sess101

Phil


--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post
Phil Stooke
post Jun 14 2019, 05:35 PM
Post #228


Solar System Cartographer
****

Group: Members
Posts: 7906
Joined: 5-April 05
From: Canada
Member No.: 227



This is the map from the abstract (hopefully considered 'fair use' for educational purposes). It is an excellent illustration of how the rover is driven, not with a 'joystick' controller and live (slow-frame) TV like the Lunokhods, but by mapping a safe route from end-of-drive images like the various Mars rovers. Sites are labelled, so I will be updating the route map soon.

Phil

Attached Image


--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post
John Moore
post Jun 20 2019, 02:23 PM
Post #229


Junior Member
**

Group: Members
Posts: 92
Joined: 22-May 09
From: Ireland
Member No.: 4792



Below, an attempt to match the doughnut track positions to Phil's map. But don't take them as literal, as with most tracks, they all look the same, so open to correction (it all has to do with viewing/estimating the angles between each doughnut track - some approach angles under 90 degrees, others over 90, not to mention the paths taken, where some are straight-like, some curvable).

John
Attached thumbnail(s)
Attached Image
 
Go to the top of the page
 
+Quote Post
Phil Stooke
post Today, 05:36 PM
Post #230


Solar System Cartographer
****

Group: Members
Posts: 7906
Joined: 5-April 05
From: Canada
Member No.: 227



That looks good, John.

Several new images were tweeted by Andrew Jones.

https://twitter.com/AJ_FI/status/1143769296973291521


Here I have reprojected them to make it easier for me to compare with a map, but so far I don't have good matches to locations for them. They suggest that the rover moved a bit to the west and then turned south during day 6 (so a map revision is needed), but I don't know enough to draw the route yet.

The article linked by Andrew says (according to Google Translate) that there were control problems during day 6 caused - apparently - by a single bit flip error on a chip. The Mars rovers have seen these occasionally and recovered. They are caused by cosmic ray strikes. Yutu 2 has been recovered successfully.

Attached Image
Attached Image
Attached Image


EDIT: I replaced the middle image with a different version. The orientation is changed, but please bear in mind that these Hazcam images have a wider field of view than I show here.


--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post

16 Pages V  « < 14 15 16
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 26th June 2019 - 10:43 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.