Zhurong Lander/Rover, Surface Operations at Utopia Planitia |
Zhurong Lander/Rover, Surface Operations at Utopia Planitia |
May 15 2021, 01:10 AM
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#31
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Apparently: 109.7 E, 25.1 N; (top middle of this map: https://en.wikipedia.org/wiki/Amenthes_quad...Region-mola.png )
A bit North of the crater called Bluff.... |
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May 15 2021, 01:56 AM
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#32
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Senior Member Group: Members Posts: 1452 Joined: 26-July 08 Member No.: 4270 |
From here.
QUOTE On CCTV it was reported that "first opportunity to downlink photos will be around midday-afternoon BJT", i.e. within next few hours. The relay orbiter is currently on the opposite side of Mars.
-------------------- -- Hungry4info (Sirius_Alpha)
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May 15 2021, 01:57 AM
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#33
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Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Guest_Steve5304_* |
May 15 2021, 02:30 AM
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#34
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Guests |
WoW!!
Congrats to the Peoples Republic of China What an amazing achievement for such a new space program! I hope we start getting Chinese posters! |
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May 15 2021, 07:32 AM
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#35
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
The coordinates have been moved a bit, to 25.1 N, 109.9 E. That moves it out of the CTX image volcanopele posted and puts it about here:
The hills seen in the first orbital image are at lower right. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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May 15 2021, 07:58 AM
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#36
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Member Group: Members Posts: 559 Joined: 1-May 06 From: Scotland (Ecosse, Escocia) Member No.: 759 |
Chinese news media are reporting "nine minutes of terror" during the landing, so two more than the usual American seven minutes!
The official landing time from CGTN was 23:18 UTC (GMT) so 7 minutes later than was being predicted by Chinese sources before the descent. The whole craft (both orbiter and lander) started descending from orbit at about 17:00 UTC and entered the long descent trajectory. The landing module, consisting of the lander and the rover, separated from the orbiter after 3 hours at about 20:00 UTC according to the CNSA. Then, 30 minutes later, so about 20:30 UTC, the orbiter fired its engine to leave the decent trajectory (which it was also now on, temporarily, to drop off the lander) and returned to a safe orbit. After being dropped off the lander had a 3-hour voyage to entry interface. These announced times seem to be approximate. I believe this is a new technique for Martian atmospheric entry, but was previously used by Galileo at Jupiter and Cassini at Titan. |
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May 15 2021, 04:42 PM
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#37
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Member Group: Members Posts: 559 Joined: 1-May 06 From: Scotland (Ecosse, Escocia) Member No.: 759 |
Xinhua News Agency has reported more details of the landing. No pictures as yet.
It took ground controllers more than an hour to establish the success of the pre-programmed landing. They had to wait for the rover to autonomously unfold its solar panels and antenna to send the signals after landing, and there was a time delay of more than 17 minutes due to the 320-million-km distance between Earth and Mars. "The Mars landing of the Tianwen-1 mission has been a total success," Zhang Kejian, head of the CNSA, announced at the Beijing Aerospace Control Center. It will take a further 7 to 8 days for the rover to detect the surrounding environment and conduct self checks before moving down from the lander to the Martian surface. Xinhua post-landing update |
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May 15 2021, 07:49 PM
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#38
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Member Group: Members Posts: 109 Joined: 25-November 04 From: Dublin, Ireland Member No.: 113 |
Xinhua News Agency has reported more details of the landing. No pictures as yet. It took ground controllers more than an hour to establish the success of the pre-programmed landing. Xinhua post-landing update Is there someone with some insight into the likely comms opportunities? For instance, I have seen speculation that on May 17 Zhurong will communicate with Tianwen-1 via ESA MarsExpress. I would have assumed that Tianwen-1 is over the horizon *much* longer than lower-orbit assets. Am I missing something? Is someone running the numbers? |
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May 15 2021, 08:29 PM
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#39
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
https://mobile.twitter.com/df2mz/status/1393617519257268225
"This screen shot from CCTV seems to show that the Zhurong rover already communicated with Earth, opened its solar panels and downloaded some data." Edgar Kaiser "rover landed still; started to communicate with earth; communication finished; rover unlocked/lifted up; solar wings opened; obiter adjusted position . Data downloaded in last 3 lines" -------------------- "The Earth is a very small stage in a vast cosmic arena"
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May 15 2021, 09:02 PM
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#40
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Member Group: Members Posts: 613 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
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May 15 2021, 09:08 PM
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#41
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Senior Member Group: Members Posts: 1452 Joined: 26-July 08 Member No.: 4270 |
Some rough translations of the screenshot here... I think. Feel free to improve upon them with the times and copyable text.
8:01:24 火星车静态定姿 = Putting the rover in the proper attitude. 8:14:39 火星车对地通信开始 = Start of rover-to-ground comm. 8:32:04 火星车对地通信结束 = End of rover-to-ground comm. 8:38:04 火星车脱插分离,车体抬升 = Rover separation (from lander?) and body lifted. 8:59:04 火星车太阳翼展平 = Rover solar wing deployed. 9:48:39 环绕器-Z对日姿态调轨开始 = Orbiter Z-axis starts moving toward the sun. 12:00:39 固连遥测探头数据点播下传 = On-demand? telemetry download? 12:29:39 近距离遥测探头数据点播下传 = Short-range telemetry download? 13:15:39 降轨,两器分离数据点播下传 = Decrease orbit, separate the two devices? and download data on demand? -------------------- -- Hungry4info (Sirius_Alpha)
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May 15 2021, 09:33 PM
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#42
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Member Group: Members Posts: 149 Joined: 18-June 08 Member No.: 4216 |
https://mobile.twitter.com/df2mz/status/1393617519257268225 "This screen shot from CCTV seems to show that the Zhurong rover already communicated with Earth, opened its solar panels and downloaded some data." Edgar Kaiser "rover landed still; started to communicate with earth; communication finished; rover unlocked/lifted up; solar wings opened; obiter adjusted position . Data downloaded in last 3 lines" Perhaps I am reaching, but is that a picture of a rock up on that screenshot? |
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May 15 2021, 09:38 PM
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#43
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Member Group: Members Posts: 185 Joined: 4-January 19 Member No.: 8523 |
Perhaps I am reaching, but is that a picture of a rock up on that screenshot? Mabe they are working with some visual data. But they didn't get it right yet. Hard to wait for the images... -------------------- "The Earth is a very small stage in a vast cosmic arena"
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May 15 2021, 09:44 PM
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#44
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Senior Member Group: Members Posts: 1452 Joined: 26-July 08 Member No.: 4270 |
It looks like there's some sort of reflecting going on somewhere creating two image planes here -- one being the reflection of the screen in the glass(?) and the other being whatever is behind it. For some reason I can't quite make sense of what's going on. Just below the rock-like shape, there's this white jagged line. Is that a graphical representation of a radio signal? A reflected bit of light from somewhere? I'm not sure which is the original screen (the white line or the rock-like shape) and which is a reflection of something unrelated.
-------------------- -- Hungry4info (Sirius_Alpha)
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May 15 2021, 11:11 PM
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#45
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
Both Viking Landers were also deployed from orbit around Mars, like Tianwan - but I think what's unique here, and is more similar to ExoMars-TGO with Schiaparelli, Mars Express with Beagle 2, Galileo and Cassini Huygens compared to Viking - is that in those 4, the 'parent' spacecraft put itself on a collision course before deploying the lander and then doing a divert maneuver. In the case of Viking 1 and 2 - the landers themselves did their own deorbit burn to being entry into the atmosphere.
I think the only unique corner of all those boxes to be ticked yesterday is a parent spacecraft already in orbit putting itself into a trajectory for landing before deploying the lander and then doing a divert maneuver. Phew. |
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