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Zhurong Lander/Rover, Surface Operations at Utopia Planitia
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post May 14 2021, 05:05 AM
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Per this source, landing currently scheduled for 14 May/2300 UTC. Please post any relevant information and updates here.

GO ZHURONG!!!!!


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Huguet
post May 14 2021, 12:14 PM
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CNSA: "China’s first Mars exploration mission, Tianwen-1 probe has functioned normally since its successful launch on July 23rd, 2020. On February 10th, 2021, Tianwen-1 probe entered the Martian orbit for scientific exploration and huge amount of scientific data are available up to date. With the evaluation of the flight status, Tianwen-1 probe is scheduled to perform landing campaign targeting Utopia Planitia at the proper slot from the early morning of May 15th to May 19th Beijing time."
http://www.cnsa.gov.cn/english/n6465652/n6...00/content.html

Oficial statement from CNSA, so the window starts today 23:00 UTC, but they can skip it and have two more windows beetween 15 and 19, beijing time is UTC + 8, so we have this 3 dates of periapsis for landing, by Edgar Kaiser:
2021.05.14 23:02:44 Start of the Windows of Landing, oficial statement by CNSA
2021.05.17 00:17:35
2021.05.19 01:32:26
https://twitter.com/df2mz/status/1391876766294331395

Interesting point remembering the importance of amateur radio enthusiasts on space exploration. Without then we would be blind.
https://twitter.com/AJ_FI/status/1393164426593902597
Nice Interview with Scott Tilley from British Columbia about listening Tianwen-1 over Mars:
Tianwen-1, on the other hand, has a relatively large antenna with a booming signal. “China probably plans to use it as a relay for future Chinese space missions,” Tilley speculates. “This makes it a good target for hams hoping to bag their first Martian spacecraft.”
https://spaceweatherarchive.com/2021/02/16/...nals-from-mars/


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Huguet
post May 14 2021, 01:26 PM
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Live of the landing or skip with radio signals by RocketGyan starting at 22:15 UTC:
https://www.youtube.com/watch?v=TGijtGSUEJs
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Huguet
post May 14 2021, 03:35 PM
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Live signal from Edgar Kaiser, will go live till 23:00, minutes before landing possible attempt, we should get something in 30 minutes indicating if they will try it today.

Now we have two feeders getting tianwen-1, one live, the other will start 22:15 UTC.

The separation would happen more or less at 18:00 UTC if they will try it today, it will be visible at Edgar Kaiser live.

https://www.youtube.com/watch?v=RupTNWUuxsg
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Huguet
post May 14 2021, 04:14 PM
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They are doing a maneuver now! Separation... or alignment of orbiter to do the separation... or changing from High Gain to Low Gain Antenna

https://www.youtube.com/watch?v=RupTNWUuxsg

Lost it on Edgar Kaiser, so HGA not available, action done, possible atempt landing today.

Signal lost by an action on orbiter at: 16:09 UTC.
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Huguet
post May 14 2021, 04:42 PM
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Possible cofirmation of landing process happening from Zhurong official weibo account.

"Tianwen1 has entered the landing process! I am expected to start entering the atmosphere of Mars tomorrow (UTC in a few hours) and land at an opportune time"

Landing process started at 16:01 (16:08 minus 7 minutes delay of the signal...)

https://twitter.com/df2mz/status/1393240504020647941

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Huguet
post May 14 2021, 06:09 PM
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Passed separation time, if all goes well we should got a signal 1 hour from now.
AMSAT got a signal from LGA. Everything seens ok.


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djellison
post May 14 2021, 06:18 PM
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The Amsat DL team with their large antenna in Bochum are tracking it live - https://www.youtube.com/watch?v=hEfAxmkBagg
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Phil Stooke
post May 14 2021, 06:25 PM
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If we have a successful landing there will be a map thread. It may be very sporadically updated depending on how operations are covered.

Phil


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Huguet
post May 14 2021, 06:25 PM
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QUOTE (djellison @ May 14 2021, 03:18 PM) *
The Amsat DL team with their large antenna in Bochum are tracking it live - https://www.youtube.com/watch?v=hEfAxmkBagg

Very nice link, High Gain Antenna back alive!!!!! Everything seens perfect...
Possible Separation ok and orbiter returned to his normal position.

Oh my,... 2 live feeds... 1 more to join,.. this is just so perfect.
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Phil Stooke
post May 14 2021, 06:35 PM
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The landing site is probably the same one indicated at the left here. I have not seen anything specific about the location.

The small crater names were given back in the early 1970s when this area (centered a bit to the west) was considered for Viking under the name Amenthes.

Phil
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Huguet
post May 14 2021, 06:45 PM
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We got a new burn, probably to distance the orbiter from the lander or unlocked something,.. or else...
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kenny
post May 14 2021, 07:06 PM
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Regarding the landing burns, the procedure is apparently to de-orbit the whole assembly (both orbiter and lander) into a descent trajectory which intersects the Martian atmosphere, then release the orbiter. After separation, the orbiter portion does another engine burn to raise itself back into Mars orbit to continue its mission. The lander in its entry shell continues down into the atmosphere. This avoids having to provide separate de-orbit engines for the lander capsule, as was the case with the US Viking probes.
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Huguet
post May 14 2021, 07:14 PM
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QUOTE (kenny @ May 14 2021, 04:06 PM) *
Regarding the landing burns, the procedure is apparently to de-orbit the whole assembly (both orbiter and lander) into a descent trajectory which intersects the Martian atmosphere, then release the orbiter. After separation, the orbiter portion does another engine burn to raise itself back into Mars orbit to continue its mission. The lander in its entry shell continues down into the atmosphere. This avoids having to provide separate de-orbit engines for the lander capsule, as was the case with the US Viking probes.


Thanks,.. that can explain the last burn, i think the next lose off HGA will be the orbiter changing its direction to image the landing. we should have that 3 hours from now... so the separation was more a drop maneuver then a normal separation... I expect then to release a nice footage of the heat shield, parachute, burn landing. That would be perfect.


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Huguet
post May 14 2021, 08:25 PM
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The orbiter just turned from HGA to LGA, possible its starting to image or to follow somehow the lander. Very early to do that, possible it is now making the burn to achieve parking orbit again. Less then 3 hours to heat shield burning.

Its impressive that we are geting a good info from a dish with 1 meter in diameter...


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