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Post-Sampling & Earth Return
nprev
post Oct 24 2020, 07:02 AM
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Now that the 'boop' has been completed (with spectacular success!), we'll move the discussion to here for subsequent mission events. smile.gif


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Hungry4info
post Sep 14 2021, 01:40 AM
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The OSIRIS-REx team used an alternative method to determine the sample mass.

Alternative Sample Mass Measurement Technique for OSIRIS-REX Sample Collection Phase
https://arxiv.org/abs/2109.05561

QUOTE
...The alternative SMM technique utilized reaction wheel momentum data from identical TAGSAM movements prior to and following the TAG event to estimate changes in spacecraft moment of inertia. Conservation of momentum was used to isolate the sample mass from this inertia change. Using this new method, the spacecraft team was able to successfully estimate collected sample mass to be 250.37 +/- 101 g.


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vjkane
post Sep 14 2021, 03:11 PM
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QUOTE (Hungry4info @ Sep 13 2021, 05:40 PM) *
The OSIRIS-REx team used an alternative method to determine the sample mass.

Alternative Sample Mass Measurement Technique for OSIRIS-REX Sample Collection Phase
https://arxiv.org/abs/2109.05561

That's a clever approach. They collected ~4-6 times more material than their mission success criteria! I was thinking that with the sampling head literally overflowing, it might be even more. Perhaps a lot of porosity?

Looking forward to the return of the samples.


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fredk
post Sep 14 2021, 04:24 PM
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QUOTE (vjkane @ Sep 14 2021, 04:11 PM) *
They collected ~4-6 times more material than their mission success criteria!

They collected 150-350g, so 2.5 to almost 6 times the 60g requirement.

They reported (250.37 +/- 101)g - to be pedantic, that's a pretty severe example of overstated precision! (0.25 +/- 0.10)kg is more realistic.

But it is indeed a cool application of momentum conservation (as was the original plan).
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Posts in this topic
- nprev   Post-Sampling & Earth Return   Oct 24 2020, 07:02 AM
- - walfy   Boosted the shadows to reveal what I assume are th...   Oct 24 2020, 08:37 AM
- - dsmillman   The audio of the 10/23/2020 teleconference can be ...   Oct 24 2020, 01:30 PM
|- - Reed   QUOTE (dsmillman @ Oct 24 2020, 06:30 AM)...   Oct 25 2020, 06:32 AM
- - Tom Tamlyn   Thanks to for that link. It was a great press co...   Oct 24 2020, 06:55 PM
|- - JRehling   Looking at the apparent fragility of those "r...   Oct 24 2020, 07:24 PM
||- - HSchirmer   QUOTE (JRehling @ Oct 24 2020, 07:24 PM) ...   Oct 27 2020, 12:20 AM
|- - Explorer1   QUOTE (Tom Tamlyn @ Oct 24 2020, 01:55 PM...   Oct 24 2020, 09:56 PM
|- - rlorenz   QUOTE (Explorer1 @ Oct 24 2020, 05:56 PM)...   Oct 25 2020, 10:16 PM
|- - mcaplinger   QUOTE (rlorenz @ Oct 25 2020, 02:16 PM) I...   Oct 25 2020, 11:21 PM
||- - JRehling   Apollo 13 had a bit of a concern regarding sample ...   Oct 26 2020, 03:58 AM
|- - HSchirmer   QUOTE (rlorenz @ Oct 25 2020, 10:16 PM) I...   Oct 27 2020, 12:23 AM
- - marsbug   It's a nice problem to have in a way... but it...   Oct 24 2020, 09:18 PM
- - dtolman   So they cancelled the spin because visual inspecti...   Oct 24 2020, 10:42 PM
|- - Marcin600   QUOTE (dtolman @ Oct 25 2020, 12:42 AM) S...   Oct 25 2020, 12:33 AM
- - stevesliva   QUOTE (mcaplinger post Oct 23 2020 @ 06:56 P...   Oct 26 2020, 01:50 PM
- - jccwrt   If Bennu regolith is anywhere near as sticky as lu...   Oct 26 2020, 05:39 PM
- - Explorer1   Expedited stow begins tomorrow. Images will be ret...   Oct 26 2020, 08:41 PM
- - Marcin600   An excerpt from Dante Lauretta speech about the du...   Oct 26 2020, 09:42 PM
- - pbanholzer   Here's an article on contamination control for...   Oct 27 2020, 01:10 AM
- - Hungry4info   OSIRIS-REx in the Midst of Stow https://www.astero...   Oct 28 2020, 10:47 PM
- - Marcin600   NASA will host a media teleconference at 4 p.m. ED...   Oct 29 2020, 05:05 PM
- - Marcin600   From teleconference: 400 g was visible in the came...   Oct 29 2020, 08:52 PM
- - Explorer1   Dante just said that the navcam was taking images ...   Oct 29 2020, 09:03 PM
|- - mcaplinger   QUOTE (Explorer1 @ Oct 29 2020, 01:03 PM)...   Oct 30 2020, 06:40 PM
- - Marcin600   From teleconference (+/-): "...The fact that ...   Oct 29 2020, 09:25 PM
- - Marcin600   From teleconference (+/-): "...The ship's...   Oct 29 2020, 10:16 PM
- - Marcin600   Once again Dante Lauretta statement about Bennu...   Oct 30 2020, 06:05 PM
- - Hungry4info   Absolutely spectacular video of the sampling. We s...   Oct 30 2020, 09:59 PM
- - Marcin600   A little lightened. Could it be a crater? (dug by ...   Oct 31 2020, 01:29 AM
- - Marcin600   Animated gif   Oct 31 2020, 01:35 AM
- - FOV   I agree Hungry4info. Spectacular. My messing abo...   Oct 31 2020, 01:37 AM
- - Marcin600   a little earlier - and closer   Oct 31 2020, 01:48 AM
- - Marcin600   edge of the hole ?   Oct 31 2020, 01:57 AM
- - Marcin600   first stages   Oct 31 2020, 02:09 AM
- - Explorer1   Wow! dusting off the old swear jar! The l...   Oct 31 2020, 02:22 AM
- - Marcin600   the second stage I wonder if all these thin, elon...   Oct 31 2020, 02:29 AM
- - Brian Swift   Before and After. Frames 274 and 469 from NavCam2_...   Oct 31 2020, 07:25 AM
|- - Marcin600   QUOTE (Brian Swift @ Oct 31 2020, 08:25 A...   Oct 31 2020, 12:27 PM
- - Greenish   Agree that these are fantastic images, most inspir...   Oct 31 2020, 04:54 PM
|- - Greenish   And here are two more, from adjacent frames (no sh...   Oct 31 2020, 06:01 PM
- - Marcin600   My attempt to make "before-and-after" an...   Nov 1 2020, 01:05 AM
- - Marcin600   Now it looks to me as if a cloud of debris was com...   Nov 1 2020, 02:29 AM
- - Greenish   Animated movie of the 'blast,' starting fr...   Nov 1 2020, 04:46 AM
|- - Guillermo Abramson   QUOTE (Greenish @ Nov 1 2020, 01:46 AM) A...   Nov 4 2020, 12:23 PM
|- - Marcin600   QUOTE (Greenish @ Nov 1 2020, 05:46 AM) A...   Nov 4 2020, 05:12 PM
- - monty python   Wow Greenish! Emptied my wallet into the swear...   Nov 1 2020, 05:31 AM
- - Marcin600   My rough attempt to put the post sampling picture ...   Nov 14 2020, 04:35 AM
- - Marcin600   And also an attempt to superimpose a post sampling...   Nov 14 2020, 04:37 AM
- - Marcin600   SamCam and NavCam 2 Imaging Footprint During TAG -...   Nov 17 2020, 08:55 PM
- - Marcin600   I added my own interpretation of the TAGSAM head t...   Nov 18 2020, 09:36 PM
- - Marcin600   Considerations on the extended OSIRIS-REx mission ...   Jan 19 2021, 08:19 PM
- - stevesliva   *Orbit* Apophis. Wow. The duration post-sample ...   Jan 19 2021, 08:46 PM
|- - vjkane   QUOTE (stevesliva @ Jan 19 2021, 12:46 PM...   Jan 19 2021, 11:01 PM
- - Explorer1   I've read about some other proposals for Apoph...   Jan 20 2021, 03:19 AM
|- - JRehling   2021: Everyone's hoping that Osiris-Rex will h...   Jan 20 2021, 03:28 AM
|- - vjkane   QUOTE (Explorer1 @ Jan 19 2021, 07:19 PM)...   Jan 20 2021, 04:12 PM
|- - Marcin600   QUOTE (Explorer1 @ Jan 20 2021, 04:19 AM)...   Jan 21 2021, 07:48 PM
- - Explorer1   Yes, those are what I read, thanks for finding it...   Jan 21 2021, 12:35 AM
- - Explorer1   A final Bennu flyby is planned for April to check ...   Jan 27 2021, 04:09 PM
|- - Marcin600   QUOTE (Explorer1 @ Jan 27 2021, 05:09 PM)...   Jan 30 2021, 03:21 PM
- - Marcin600   "The International Astronomical Union (IAU) h...   Feb 5 2021, 12:57 AM
- - Marcin600   A final flyby of Bennu (and Nightingale) on April ...   Feb 9 2021, 01:52 PM
- - Marcin600   „This image...was taken...on March 4, from a dista...   Mar 8 2021, 08:37 PM
- - Marcin600   "...As of Mar. 12, the spacecraft was about 1...   Mar 15 2021, 08:22 PM
- - alan   Saw this on twitter: QUOTE Jason Major @JPMajor B...   Mar 22 2021, 10:12 PM
- - Marcin600   "The OSIRIS-REx spacecraft... is currently ab...   Mar 30 2021, 03:55 PM
- - Marcin600   https://www.asteroidmission.org/?latest-new...-ast...   Apr 8 2021, 04:31 PM
- - pbanholzer   Marc - Thanks for the updates. Do you know what t...   Apr 10 2021, 07:25 PM
- - Marcin600   I was unable to find information about the exact p...   Apr 13 2021, 06:00 PM
- - pbanholzer   Thanks so much for all of this. More than I expec...   Apr 15 2021, 04:33 PM
- - Explorer1   Images released: https://www.nasa.gov/feature/godd...   Apr 15 2021, 06:20 PM
- - Explorer1   Press conference and new images to be released Mon...   May 7 2021, 02:34 PM
- - Marcin600   Jun 04, 2021: "NASA’s OSIRIS-REx spacecraft i...   Jun 8 2021, 05:46 PM
- - vjkane   NASA has put out its call for proposals for extend...   Jul 16 2021, 04:23 AM
- - Hungry4info   The OSIRIS-REx team used an alternative method to ...   Sep 14 2021, 01:40 AM
- - vjkane   QUOTE (Hungry4info @ Sep 13 2021, 05:40 P...   Sep 14 2021, 03:11 PM
- - fredk   QUOTE (vjkane @ Sep 14 2021, 04:11 PM) Th...   Sep 14 2021, 04:24 PM


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