Tianwen-1 At Mars |
Tianwen-1 At Mars |
Feb 8 2021, 03:04 PM
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#1
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Member Group: Members Posts: 219 Joined: 14-November 11 From: Washington, DC Member No.: 6237 |
For those who haven't already seen, there is excellent work independently tracking and predicting the trajectory of Tianwen-1 by radio amateurs (using that word only technically, since they are very much pros).
The latest is predicting orbital insertion at 8 seconds before 1200 UTC on Wednesday 10 February, with a 386 km periapsis - burn starts a few minutes before that if you, like me, are planning your peanut consumption carefully this week. Plenty of details to be found at these links (even a GMAT script and Jupyter notebook, and some doppler data, for the astrodynamically inclined). https://destevez.net/tag/tianwen/ Daniel Estévez recent twitter thread with MOI images Scott Tilley recent twitter thread |
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May 13 2021, 11:43 AM
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#2
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
The Zhurong will use the same navigation technology used on Chang'e-4, based on rotating stereo pair of câmeras. May have some changes, but the same methods used on one batch of data will deal with the other. -------------------- "The Earth is a very small stage in a vast cosmic arena"
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May 13 2021, 03:15 PM
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#3
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Senior Member Group: Members Posts: 1585 Joined: 14-October 05 From: Vermont Member No.: 530 |
The Zhurong will use the same navigation technology used on Chang'e-4, based on rotating stereo pair of câmeras. May have some changes, but the same methods used on one batch of data will deal with the other. What are the circular patches on the back of the rover? There must be some reason they don't have solar cells on them. I wonder how much artistic license there is in that image, or will even the camera calibration target look so familiar... |
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May 13 2021, 03:23 PM
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#4
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
What are the circular patches on the back of the rover? There must be some reason they don't have solar cells on them. This is the best photo i have seen from the Zhurong. I have been alerted that these are thermal windows,.. so.. i don't know. -------------------- "The Earth is a very small stage in a vast cosmic arena"
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