Author Topic: ESA's Rosetta and Philae Mission at Comet 67P - Post Landing UPDATES  (Read 186895 times)

Offline Chris Bergin

This is the UPDATES ONLY thread for Rosetta and Philae post landing coverage.

News articles:
http://www.nasaspaceflight.com/?s=Rosetta

Central Thread covering arrival, landing and post landing discussion.
http://forum.nasaspaceflight.com/index.php?topic=35353.0

This thread is for updates only.

Offline R7

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ok putting this here too:

Now it seems they landed ... thrice?!

https://twitter.com/elakdawalla/status/532678187239493632

Emily Lakdawalla ‏@elakdawalla

!!!! ........... !!! ... !! RT @Philae_ROMAP: @Philae_ROMAP magnetic field analysis revealed 3 landings at 15:33, 17:26 and 17:33 UTC
AD∑ASTRA∑ASTRORVM∑GRATIA

Offline Danderman

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http://www.bbc.com/news/science-environment-30026398

A European robot probe has made the first, historic landing on a comet, but its status is uncertain after harpoons failed to anchor it to the surface.

Officials said the craft may have lifted off the comet after touchdown before returning to the surface.

Lander project manager Stephan Ulamec said: "Maybe we didn't just land once, we landed twice."
« Last Edit: 11/13/2014 12:36 AM by Danderman »

Offline DT1

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ok putting this here too:

Now it seems they landed ... thrice?!

https://twitter.com/elakdawalla/status/532678187239493632

Emily Lakdawalla ‏@elakdawalla

!!!! ........... !!! ... !! RT @Philae_ROMAP: @Philae_ROMAP magnetic field analysis revealed 3 landings at 15:33, 17:26 and 17:33 UTC
DLR chief Woerner is just confirming this three-time landing in German TV.
---------------------------
Ralf
*** AD ASTRA PER ASPERA ***

Offline aga

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acc. to several tweets, one from jonathan amos, they have again connection to philae

https://twitter.com/BBCAmos/status/532804735045488640
Quote
Holger Sierks (Osiris) tells the BBC there has been radio communication with @Philae2014 this AM. Now trying to image it on the surface.
« Last Edit: 11/13/2014 07:33 AM by aga »
42

Offline woods170

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Summarizing current status from multiple sources:
- Lander bounced twice and thus landed three (3) times.
- First bounce likely sent lander substantial distance back into space. Bounce height is to be determined. First bounce lasted two hours.
- Lander likely has come to rest closer to the 'neck' of the comet, due to the comet rotating underneath Philae during the first major bounce.
- Solar panels are generating electrical power. Electrical levels within expectations.
- Communications are fully operational. Clear signals being received via Rosetta.
- Science sequence will have to be reworked.
- «IVA-P imaging device was in auto-mode during the bouncing. Shot many images. All images downloaded to earth. Images show mostly empty space or streaks. This is because of the bounce back into space.
- Likely «IVA-P will be commanded to perform a new sequence upon available communications window today.
- COSAC, CONCERT, PTOLEMY, ROMAP and ROLIS all got data during and after landing phase. Data was delivered to earth, via Rosetta, in good order.
- No drilling today. Harpoons failed to either fire or to anchor. Exact nature of failure is not yet fully understood. Without Philae being anchored to surface drilling is out of the question.
- Rosetta will be commanded to image the comet to help ascertain exact location of Philae on surface.
« Last Edit: 11/13/2014 08:49 AM by woods170 »

Offline aga

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42

Online Galactic Penguin SST

Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline woods170

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Image shows one leg at left hand side. CONCERT antenna in contact with rock at right hand side. So, either Philae landed smack right next to a big rock or...

...it is laying on one side (and thus has toppled).

We will know more after the press conference. Plan is to show the full CIVA panorama at the press conference.

Offline woods170

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Summarizing from CNES press conference:

- Final landing location 1 kilometer (1 KM) from initial landing site
- Bounce into space, after initial landing, was "hundreds of meters".
- Decision to deploy MUPUS and APXS instruments has not yet been taken
- Confirms that harpoons did not fire at all.
- Apart from drilling equipment, MUPUS and APX, all other instruments are returning plenty of data.
- No drilling experiment due to fact that Philae is not secured to surface.
- 1 Hour and 30 minutes of available sunlight per 12 hour rotation period due to current lander position and position of solar panels. It is understood that Philae finally came to stop in a depression in the surface. This severly reduces amount of available sunlight.
- Battery currently NOT charging due to very limited amount of available sunlight.
- Approximately 50 to 55 hours worth of electrical power left in non-charging battery
- This is enough to complete planned science sequence for the operating science instruments.
- Exact position of Philae lander relative to surface is not yet fully understood. Tilt to horizontal at least larger than 30 degrees.
- At next press conference ROLIS image will show that lander did not dig itself into the surface.
« Last Edit: 11/13/2014 10:42 AM by woods170 »

Offline bolun

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http://blogs.esa.int/rosetta/2014/11/13/rosetta-operations-update/

Rosetta Operations Update

Quote
- Rosetta is operating nominally; the network systems and overall ground segment to control the mission are nominal

- Last night, Rosetta lost contact with Philae as expected when it orbited below the horizon just after 20:00 CET.

-Contact was re-established this morning at 06:01 UTC / 07:01 CET, and the Philae-Rosetta radio link was initially unstable.

- As Rosetta rose higher above the Philae landing site, the link became very stable and the lander could transmit telemetry (status and housekeeping information) and science data from the surface.

-This morning's surface link was again lost due to Rosetta's orbit at about 09:58 UTC / 10:58 CET. Ignacio explains that with the current orbit, Rosetta will have, typically, two Philae communication windows per day.

-The next window opens at 19:27 UTC on the spacecraft and runs through to 23:47 UTC spacecraft time.

The team are ensuring that Rosetta maintains an orbit that is optimised for lander communication support; they are planning a manoeuvre (thruster burn) today to be conducted on Friday that will help keep Rosetta where it should be. Rosetta already conducted a burn last night as part of this effort.

Rosetta is presently sending signals to the ground stations at about 28 Kbps; Ignacio says that the spacecraft's own telemetry downlink uses about 1 or 2 Kbps of this, so the rest is being used to download science data from Rosetta and lander science and telemetry from the surface.

Offline _INTER_

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Rotating the picture also seems to result in valid positions.

Offline Ohsin

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Hot mic

http://rosetta.esa.int/

Media Briefing about to begin!
"Well, three cheers to Sharma, but our real baby is INSAT."

Offline woods170

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Presser about to begin.

Edit: not yet
« Last Edit: 11/13/2014 12:13 PM by woods170 »

Offline woods170

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Presser started.
« Last Edit: 11/13/2014 12:15 PM by woods170 »

Offline woods170

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Jean Pierre on

Offline woods170

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Rough location of Philae is known. Still zooming in on exact location.

Offline woods170

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Pierre has gone thru two nights without sleep.

Offline woods170

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Image from camera 1
« Last Edit: 11/13/2014 12:22 PM by woods170 »

Offline woods170

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Next camera. Concern antenna in view.

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