Tianwen-1 At Mars |
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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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Feb 10 2021, 01:26 PM
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#2
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 Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
Daniel Estévez (Twitter)
@ea4gpz "Acqusition of signal confirmed in @SternwarteBO shortly after 12:48 UTC. The spacecraft is still using the low gain antenna." https://twitter.com/ea4gpz/status/1359484672456196097 https://spacenews.com/chinas-tianwen-1-ente...it-around-mars/ Tianwen-1 in orbit of Mars,... we should receive some photo,.. some time... i think... ...anxious to see some of the best then 50cm resolution images it will take in the near future...
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-------------------- "The Earth is a very small stage in a vast cosmic arena"
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Feb 10 2021, 01:38 PM
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#3
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Member Group: Members Posts: 219 Joined: 14-November 11 From: Washington, DC Member No.: 6237 |
Orbital insertion confirmed. CASC says landing attempt May-June timeframe now, per Andrew Jones of SpaceNews.
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Feb 10 2021, 02:05 PM
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#4
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 Junior Member Group: Members Posts: 50 Joined: 14-January 07 From: France Member No.: 1602 |
And another one! Mars is a spoiled planet!
 What a great couple of days it has been!Congrats to the Chinese space agency, 6th to the red planet! |
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Feb 10 2021, 04:27 PM
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#5
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
Interesting is the enormous numbers of firsts for the chinese in this mission,.. and the number of technologies they are using that are well tested on the chang's missions.
1 - Arriving Mars 2 - Orbiting Mars 3 - Mars close approach and High Resolution Image Mapping 4 - Mars Landing 5 - Mars Rover The only achievment that will not be reached is Mars Return and Taikonauts to Mars.... and the first one they already proved at 1.6m/s2 moon gravity... big step to prove on mars 3.7m/s2 gravity... the second task,.. well, lets wait till they make it on Moon... -------------------- "The Earth is a very small stage in a vast cosmic arena"
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Feb 10 2021, 04:45 PM
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#6
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 Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This will be the general thread for orbital operations. A new thread will be established for landing and surface activities once those occur.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Feb 11 2021, 09:52 AM
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#7
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
"At ~13:14:20 UTC #Tianwen-1 switched from Low Gain Antenna (LGA) to High Gain Antenna (HGA) and already started to send some high speed data back to the CSNA Groundstations." Anyone to decode that?... @AMSATDL AMSAT-DL ON TIANWEN-1 https://twitter.com/amsatdl/status/1359643118782578690 21 May predicted date to land on Mars: @PRCMarsRover https://twitter.com/PRCMarsRover/status/1359834987277684740
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-------------------- "The Earth is a very small stage in a vast cosmic arena"
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Feb 11 2021, 12:58 PM
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#8
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 Member Group: Members Posts: 290 Joined: 29-December 05 From: Ottawa, ON Member No.: 624 |
Hopefully, they might be able to get a peek at neglected Deimos.
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Feb 12 2021, 11:10 AM
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#9
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 Member Group: Members Posts: 809 Joined: 3-June 04 From: Brittany, France Member No.: 79 |
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Feb 12 2021, 12:21 PM
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#10
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
Congrats CASC,... continue sending every raw footage or data yu receive from Tianwen-1, never too much... I have worked with the Yutu-2 Data and must say that if we got the same from Tianwen-1 it will be stupendous... -------------------- "The Earth is a very small stage in a vast cosmic arena"
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Feb 12 2021, 09:27 PM
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#11
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Member Group: Members Posts: 809 Joined: 3-June 04 From: Brittany, France Member No.: 79 |
I did some quick image processing on screenshots of Tianwen-1 video of Mars orbit insertion to enhance surface features.
   
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Feb 12 2021, 10:30 PM
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#12
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 Member Group: Members Posts: 226 Joined: 13-October 09 From: Olympus Mons Member No.: 4972 |
Congrats to the Chinese for being number 6 to enter orbit!!!
Looks like it photographed Albor Tholus and Elysium Chasma. -------------------- "Thats no moon... IT'S A TRAP!"
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Feb 12 2021, 11:07 PM
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#13
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
Wonderfull views of Mars overlapped by tianwen-1, one idea, CASC should release another drop cam to get a far image of Tianwen-1 with Mars at the background...
-------------------- "The Earth is a very small stage in a vast cosmic arena"
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Feb 12 2021, 11:53 PM
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#14
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 Member Group: Members Posts: 610 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
QUOTE (neo56 @ Feb 12 2021, 06:10 AM)  Very cool ! I'm surprised at the amount of foreground movement in the solar array movie (circa 45s). Not quite sure what is going on - array flexing? And if it is a structural oscillation or some controlled movement (gimballing of something, it almost looks like something is stepping or limit-cycling) |
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Feb 13 2021, 12:22 AM
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#15
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 Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
I couldn't see anywhere by what factor those clips are sped up...
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