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ExoMars - Schiaparelli landing
climber
post Oct 14 2016, 07:09 AM
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QUOTE (akuo @ Oct 13 2016, 09:56 PM) *
With Oppy being so close, was there any consideration on having it listen to Schiapparelli on UHF during the EDL?

Listening to Schiapparelli? On what Chanel laugh.gif ?


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centsworth_II
post Oct 14 2016, 07:19 AM
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QUOTE (climber @ Oct 14 2016, 02:03 AM) *
Can somebody point out Victoria crater?
It's labeled in post 1 and is the most prominent crater south of the flag in post 2.
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climber
post Oct 14 2016, 07:35 AM
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Oh yes, sorry about that.
If I remembrer correctely, so far, the landers have all overshot the center of the elipse? Is that correct? I guess we still have a chance to get pictures of Oppy's landing hardware...


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akuo
post Oct 14 2016, 09:13 AM
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QUOTE (climber @ Oct 14 2016, 10:09 AM) *
Listening to Schiapparelli? On what Chanel laugh.gif ?

Yeah, that could be a problem. I'm pretty sure lander to lander communications were not on top of their minds when these things were designed. Also the radiation cone from the UHF antenna would be pointing in wrong direction, but proximity should definitely help with that.


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climber
post Oct 14 2016, 09:26 AM
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This was just for Schiaparelli = Channels, oh well...


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katodomo
post Oct 14 2016, 07:01 PM
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QUOTE (climber @ Oct 14 2016, 09:35 AM) *
I guess we still have a chance to get pictures of Oppy's landing hardware...

DECA should have a resolution of at best 4-5 m/pixel (at 1.5 km distance), hence not much chance of that.
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Explorer1
post Oct 16 2016, 05:35 PM
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Schiaparelli seperation confirmed!
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nogal
post Oct 16 2016, 07:50 PM
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Here is a link to a page where live updates about ExoMars are being posted: http://m.esa.int/Our_Activities/Space_Scie...val_and_landing
Excerpt from the page above:
QUOTE

16 October

18:43 CEST: Full telemetry link with ExoMars/TGO has been restored via ESA's 35m deep-space ground station at Malargüe, Argentina.

18:30 CEST: The Schiaparelli module was released from the Trace Gas Orbiter (TGO) at 14:42 GMT (16:42 CEST) as planned. Today, three days before gravity will ensure the arrival of ExoMars 2016 at Mars, the Schiaparelli Entry, Descent & landing demonstrator Module separated from the TGO orbiter and is now en route on a ballistic trajectory to reach the Red Planet, enter its atmosphere and land softly in an area close to the equator known as Meridiani Planum.

However, TGO unexpectedly did not return telemetry (on-board status information), and sent only its carrier signal, indicating it is operational. The anomaly that prevents TGO's telemetry from being sent is under investigation, and is expected to be resolved within the next few hours.

Fernando
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Hungry4info
post Oct 16 2016, 09:08 PM
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ESA's official twitter confirms TGO is now returning telemetry.


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nogal
post Oct 17 2016, 11:59 PM
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A few ESA links about Schiaparelli's EDL:

Schiaparelli's descent trajectory

Schiaparelli's descento to Mars in real time (the whole 5m 52s of the descent)

ExoMars: From separation to landing

Fernando
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nogal
post Oct 19 2016, 03:20 PM
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ExoMars TGO burning proceding ok, "with slight overperformnace" (Flight Operations Director)

Schiaparelli: at 15:19 UTC it is known it was awake and executing the pre-programmed sequence. Furher information expected within the hour

Fernando
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xflare
post Oct 19 2016, 03:25 PM
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Following Tweets from ESA, it seems they were able to follow much of the EDL up until the final moments, at which point did the signal disappear? - at the point of landing??
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akuo
post Oct 19 2016, 03:28 PM
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No exact timing mentioned but the Puna radiotelescope seeing the UHF signal lost it at some point when Schiaparelli would have been in powered flight or at landing.


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xflare
post Oct 19 2016, 03:49 PM
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Mars Express transmitting EDL data now.
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Art Martin
post Oct 19 2016, 04:06 PM
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I have a question about this lander mission for the experts. I was surprised to hear the lander has no solar panels, will operate briefly until batteries run out, and has no surface cameras at all, that this mission was primarily just to practice landing techniques in preparation for a future rover mission. It sure seems that these techniques have been fully developed by the US and we are having stunning successes at landing in difficult conditions and I would assume that there would be no reservations at all about sharing the technology with ESA. While I understand that ESA wants to show they can do it on their own, the costs to send a lander are astronomical and not reinventing the wheel seems to be a very logical step. Why is ESA not piggybacking off our experience more? Was this simply a situation where they had such limited payload weights available and this was some last minute addition to the ExoMars mission or did they truly need this step? I just can't fathom going to all that trouble to set something down like this and not include solar panels and a camera.
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