LAMO, aka Low Altitude Mapping Orbit |
LAMO, aka Low Altitude Mapping Orbit |
Nov 11 2011, 10:23 PM
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#1
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
I think is time to start this new topic, now that Dawn is more than half-way in the transition from HAMO to LAMO (as showed in the plot below).
-------------------- I always think before posting! - Marco -
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Nov 11 2011, 11:53 PM
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#2
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Good thing we aren't calling it a "Low Mapping Altitude Orbit."
I get the feeling that many more surprises await us in finer detail as the surface resolution improves. -------------------- If Occam had heard my theory, things would be very different now.
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Nov 14 2011, 04:08 PM
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#3
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Another way to show the progress from HAMO to LAMO is the following updated plot where points colors reflects engine status:
I tried to interpolate average height with a blue line. Time gaps are due in part to me (not continuous monitor) and in part to Mystic simulator black-outs. EDIT: plot updated to Nov,15 -------------------- I always think before posting! - Marco -
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Nov 16 2011, 08:49 PM
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#4
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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Nov 16 2011, 08:59 PM
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#5
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Solar System Cartographer Group: Members Posts: 10256 Joined: 5-April 05 From: Canada Member No.: 227 |
Hopefully the daily image releases will resume shortly!
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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Nov 16 2011, 09:54 PM
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#6
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Senior Member Group: Members Posts: 1598 Joined: 14-October 05 From: Vermont Member No.: 530 |
Hopefully the daily image releases will resume shortly! You mean images rather than other data products? Or images specifically from LAMO? Pace hasn't slackened... now here: http://dawn.jpl.nasa.gov/multimedia/imageo...h=2011-November Last two were HAMO images, though. |
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Nov 16 2011, 11:47 PM
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#7
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Newbie Group: Members Posts: 8 Joined: 29-August 11 Member No.: 6141 |
Images from Nov. 10-13 don't currently show up on the Dawn Image of the Day page (November), but they do show up on Photojournal.
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Nov 17 2011, 04:15 PM
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#8
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Solar System Cartographer Group: Members Posts: 10256 Joined: 5-April 05 From: Canada Member No.: 227 |
The latest four images were posted on the same day... I check every day, believe me. We had a minibreak. But these are spectacular!
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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Nov 17 2011, 10:20 PM
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#9
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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Nov 18 2011, 05:20 PM
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#10
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Now that we have an improved simulator (better Vesta digital model and, especially, more frequent screen updates) I am frequently monitoring the simulated height of the probe; in the last 24 hours, engines were off but orbit isn't completely stable:
The interpolated sinusoidal curve correspond to a 5.1 hours average period between 235 and 285 km height. The reason of slight phase/amplitude variations sould be the irregular gravity field of Vesta. In fact, as explained in the last Mission Status, the purpose of these thrust stops is a natural or passive orbit adjustment (especially the orientation). Edit: slightly modified previous text and updated plot (no orbit decay) -------------------- I always think before posting! - Marco -
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Nov 23 2011, 08:41 PM
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#11
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
New update after two long simulator black-outs:
Based on today's status report, "The spacecraft thrusts occasionally with its ion propulsion system, but most of the time it coasts, letting Vesta's gravity reorient its orbit." Note also that last two published images were taken 15 days ago from an intermediate distance of 480km: http://dawn.jpl.nasa.gov/multimedia/imageo...p?date=20111123 http://dawn.jpl.nasa.gov/multimedia/imageo...p?date=20111122 -------------------- I always think before posting! - Marco -
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Nov 25 2011, 10:52 PM
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#12
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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Nov 29 2011, 10:05 PM
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#13
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
-------------------- I always think before posting! - Marco -
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Nov 29 2011, 11:54 PM
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#14
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Solar System Cartographer Group: Members Posts: 10256 Joined: 5-April 05 From: Canada Member No.: 227 |
"Dawn image EDR data will be publicly released to the science community by the PDS within 90 days after each acquisition phase. Therefore, raw Vesta approach images will be available in November 2011. Raw images for other acquisition phases including survey, high altitude (HAMO) and low altitude (LAMO) mapping orbits will be delivered throughout 2012"
"However, radiometrically calibrated PDS images (RDRs) will be publicly released six months after Vesta departure" ... from Jeffery Anderson's AGU poster abstract. Exciting! 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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Nov 30 2011, 02:34 AM
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#15
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Time for us to lurk on the Small Bodies Node website.....that is where they'll likely be hosted, right?
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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