Philae Wakes Up! |
Philae Wakes Up! |
Jul 1 2015, 09:23 PM
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#136
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Member Group: Members Posts: 153 Joined: 20-December 14 From: Eastbourne, UK Member No.: 7372 |
Nice graphic Herobrine.
That suggests to me that either Perihelion Cliff, or "Spider Hill", is blocking almost half the cone, but the crater rim is less of a problem, at lower latitudes in particular, illustrating the comments from ESA. Oh for a detailed topographical model of the Abydos environs. This area being mainly in shadow during the close orbit phase, I guess there are just not enough images of adequate resolution and illumination from multiple angles, to construct one. |
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Jul 1 2015, 10:32 PM
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#137
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Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
I added a communication cone to Philae on my Rosetta Now! simulation page: http://mattias.malmer.nu/rosetta-now/ Good work! -------------------- |
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Jul 1 2015, 11:20 PM
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#138
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Junior Member Group: Members Posts: 30 Joined: 16-November 14 Member No.: 7323 |
@Herobrine thanks for putting those times into proper context!
Btw, did anyone already post Philaes nominal communication range? According to this http://www.rmki.kfki.hu/~szalai/Publicatio...06-fulltext.pdf it is rated with up to 150km so they are really keeping the orbiter at the outer limit of this. I think under all those circumstances getting more science out of Philae will be a major achievement... i really love this mission for all the changing circumstances that require tons of improvisation. Keeps things interesting |
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Jul 2 2015, 10:31 PM
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#139
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Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
I'm on the road right now just briefly checking in. Nice to see the cone from Mattias and I agree the lower part would be blocked. Maybe a bit more than half of the cone could be intersecting Perihelion Cliff in the NE and off to the N. Will be interesting to see if Rosetta can be positioned toward the favorable part of the cone, maybe a moderately high angular altitude in the NNW sky.
-------------------- Steve [ my home page and planetary maps page ]
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Jul 3 2015, 02:20 PM
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#140
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Junior Member Group: Members Posts: 30 Joined: 22-July 11 Member No.: 6080 |
Another update from Lander Control;
http://twitter.com/DLR_en/status/616963983002730496/video/1 No new contacts, they are going to send a command on Sunday to Philae to turn on its Consert antenna. This will have different visibility constraints and so may allow contact. Sounds all a bit desperate unfortunately, something is clearly not quite right. |
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Jul 3 2015, 05:47 PM
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#141
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Senior Member Group: Members Posts: 2922 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
I don't feel it this way. Why will you sent a desperate command on a sunday? This looks like an antena alignment opportunity to me. Time will tell, as ever.
-------------------- |
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Jul 3 2015, 06:24 PM
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#142
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Junior Member Group: Members Posts: 30 Joined: 16-November 14 Member No.: 7323 |
Well in one of the DLR blog posts there has been talk about one of the two transmitters on Philae not working properly... maybe the second one failed now as well?
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Jul 4 2015, 12:09 PM
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#143
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Junior Member Group: Members Posts: 31 Joined: 8-October 12 Member No.: 6692 |
Doesn't look good. Maybe it is "too hot" now.
How much of "new" data came out of Philae ? |
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Jul 6 2015, 03:14 PM
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#144
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Member Group: Members Posts: 244 Joined: 2-March 15 Member No.: 7408 |
Quick update video from DLR today: https://video.twimg.com/ext_tw_video/618054...pUDntmQmNr.webm
Associated tweet: https://twitter.com/DLR_en/status/618054586499244037/ Summary: Rosetta hasn't received anything from CONSERT after their first attempt. They will try again Thursday under different geometrical conditions. Another status update is expected Friday. |
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Jul 8 2015, 09:53 PM
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#145
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Junior Member Group: Members Posts: 30 Joined: 16-November 14 Member No.: 7323 |
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Jul 9 2015, 07:53 PM
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#146
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Newbie Group: Members Posts: 19 Joined: 17-April 05 From: Zagreb, Croatia Member No.: 240 |
From: http://bit.ly/1JXbj2l
"Another problem may be that the lander simply can’t hear. After analyzing the data received from last month’s sporadic contacts, engineers have determined that at least one of the lander’s two receivers is broken. If the second receiver is similarly compromised, then the mission is effectively over." |
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Jul 10 2015, 12:40 PM
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#147
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
a new contact (at last!) yesterday
http://blogs.esa.int/rosetta/2015/07/10/ne...d-successfully/ |
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Jul 10 2015, 01:41 PM
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#148
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Senior Member Group: Members Posts: 2922 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
Reminds me when Spirit was kind of living is own Life when she used to have her flash issue after landing.
Very encouraging News BTW. -------------------- |
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Jul 10 2015, 03:19 PM
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#149
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Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Yes - remarkable that the command worked to turn on CONSERT, so Philae can receive as well. As the report mentions, it's unclear why this communication worked and some others didn't. I wonder how the successes and misses map out with Rosetta's latitude, and "hour angle" of both Rosetta and the Sun? Nice that they had a good signal over 12 minutes too.
-------------------- Steve [ my home page and planetary maps page ]
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Jul 12 2015, 12:39 AM
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#150
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Junior Member Group: Members Posts: 31 Joined: 8-October 12 Member No.: 6692 |
Yes - remarkable that the command worked to turn on CONSERT, so Philae can receive as well. As the report mentions, it's unclear why this communication worked and some others didn't. I wonder how the successes and misses map out with Rosetta's latitude, and "hour angle" of both Rosetta and the Sun? Nice that they had a good signal over 12 minutes too. A 12 minute continuous communication should be able to pinpoint Philae's exact location. Right ? Next we need new pictures. |
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