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Unmanned Spaceflight.com > All posts by a member| Posted on: Mar 11 2015, 05:45 PM | |
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Founder  Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1 
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QUOTE (Doug M. @ Mar 10 2015, 11:06 PM)  Djellison, I have the impression that Odyssey was part of a "family" that included MGS and Mars Climate, with MRO representing the next generation beyond. Would that be a fair statement? No - not entirely - MGS was more Mars Observer than MODY. MODY and MCO were very similar builds a generation 'newer' than MGS. MRO is a next gen design beyond that ( although heavily derived from MODY - and Juno / MAVEN borrow on that design quite heavily ) .....and the last 2 of the instruments 'lost' with Mars Observer didn't get to really do their job until MRO as their first re-flights on MCO were a loss as well ( MARCI and PMIRR/MCS ) |
| Forum: Mars Odyssey · Post Preview: #218762 · Replies: 62 · Views: 216122 |
| Posted on: Mar 11 2015, 12:14 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Especially as its instrument suite became the backbone of MGS, MCO and MODY. |
| Forum: Mars Odyssey · Post Preview: #218749 · Replies: 62 · Views: 216122 |
| Posted on: Feb 24 2015, 11:33 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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I believe you have to specifically design the instrumentation on the 'scope end to match the StarShade - and the JWST instrument manifest has been solidly defined and in development/test/build for many years. |
| Forum: Telescopic Observations · Post Preview: #218294 · Replies: 297 · Views: 418891 |
| Posted on: Feb 23 2015, 09:30 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (jasedm @ Feb 23 2015, 01:02 PM) Who has a pair of scissors and a ruler on their desk at JPL these days? .... Digital wristwatch!! This guy - ruler, scissors, mechanical pencil, and a clock made from a gear from a 2001 Williams F1 car's gearbox. My digital watch is a Pebble though.  |
| Forum: Image Processing Techniques · Post Preview: #218267 · Replies: 21 · Views: 21205 |
| Posted on: Feb 20 2015, 06:31 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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42,195 will be the Marathon line. Not far at all |
| Forum: Opportunity · Post Preview: #218204 · Replies: 3597 · Views: 3531676 |
| Posted on: Feb 12 2015, 01:15 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Seems like a healthy spacecraft - showed up on DSN Now pretty quick! |
| Forum: Earth Observations · Post Preview: #217902 · Replies: 174 · Views: 635649 |
| Posted on: Feb 4 2015, 11:23 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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| Forum: Mars Express & Beagle 2 · Post Preview: #217685 · Replies: 65 · Views: 164689 |
| Posted on: Feb 3 2015, 08:24 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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You're welcome :-) (I'm part of the team at JPL responsible for DSN Now) |
| Forum: Dawn · Post Preview: #217657 · Replies: 756 · Views: 1721531 |
| Posted on: Feb 2 2015, 10:03 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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We already designed, built and launched such a mission - it was called CONTOUR. It, sadly, was lost as it fired a motor to leave Earth orbit - but its extended mission was explicitly to do flybys of newly discovered long period comets. |
| Forum: Cometary and Asteroid Missions · Post Preview: #217632 · Replies: 13 · Views: 23170 |
| Posted on: Jan 27 2015, 04:23 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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It may well never be - occasionally speakers ask that a talk not be shared or put online. That text may be boiler plate for all presentations they host. |
| Forum: Rosetta · Post Preview: #217415 · Replies: 1412 · Views: 1230866 |
| Posted on: Jan 26 2015, 10:51 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (machi @ Jan 26 2015, 02:47 PM) BTW, according to HiView coordinates of Beagle 2 are 90.4303226,11.5270253. These are slightly different than values which Doug Ellison extracted from Google Earth (90.4295E 11.5265N). I pulled my values from HiView also...which is worrying. |
| Forum: Mars · Post Preview: #217374 · Replies: 124 · Views: 345256 |
| Posted on: Jan 26 2015, 10:44 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (MarsInMyLifetime @ Jan 26 2015, 10:24 AM) is it possible that at sundown it could image the mountain-shadow phenomenon that visitors to the top of Mauna Loa often can see? http://pancam.astro.cornell.edu/pancam_ins...847B_P2445.html Doing anything in color much beyond that time will be hard as fringing between filters will dominate the effect. Navcam might be able to pull something off. |
| Forum: Opportunity · Post Preview: #217371 · Replies: 127 · Views: 262406 |
| Posted on: Jan 26 2015, 05:54 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Honestly, I'm not expecting anything on the PDS from Rosetta's camera teams in 2015. |
| Forum: Rosetta · Post Preview: #217366 · Replies: 390 · Views: 451387 |
| Posted on: Jan 22 2015, 06:17 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Each of Dawn's 12 RCS thrusters are I believe 0.9N - 4 of which could be used if one were trying to 'land' it - but they lack both the thrust and the delta V, by probably an order of magnitude. The 747kg dry mass of Dawn would require >200 newtons - not <4. Not to mention planetary protection. |
| Forum: Dawn · Post Preview: #217256 · Replies: 756 · Views: 1721531 |
| Posted on: Jan 22 2015, 05:13 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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It's approx -3748m according to Google Earth. |
| Forum: Mars Express & Beagle 2 · Post Preview: #217253 · Replies: 65 · Views: 164689 |
| Posted on: Jan 22 2015, 02:18 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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QUOTE (TheAnt @ Jan 21 2015, 04:21 PM) most landers stand on a platform with legs. Not really. Of the 8 'successful' landers (I include Beagle 2) - 4 landed on airbags, three with legs, one on its wheels. For MER and MPF, by virtue of their airbags, they ended up rolling roughly to a stop in a flat enough place for initial deployments. I would expect B2 to have done something similar, but realistically, who knows. |
| Forum: Mars Express & Beagle 2 · Post Preview: #217232 · Replies: 65 · Views: 164689 |
| Posted on: Jan 21 2015, 11:47 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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DSN costs are amortized across multiple Mars missions thanks to MSPA DSN capabilities.you either operate the rover ( at something around $15m/yr) or you don't. The team can't get much smaller whilst still being a viable ops team. |
| Forum: Opportunity · Post Preview: #217226 · Replies: 593 · Views: 516287 |
| Posted on: Jan 21 2015, 03:52 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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It's not a power issue - it's the UHF antenna being obscured by one or more of the solar panels. The UHF antenna was under all 4 panels. Without them deploying.....the UHF antenna can't 'see' the sky - and a carbon composite solar panel covered in silicon and wires is a very good way to block UHF signals. |
| Forum: Mars Express & Beagle 2 · Post Preview: #217214 · Replies: 65 · Views: 164689 |
| Posted on: Jan 21 2015, 05:40 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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You're probably not culling the header before reading the image. I just tried it and it loads fine in Photoshop as a 32 bit file when you tell it the header is 69124 bytes. One needs to apply a stretch, obviously, to get an image with visible contrast. Moreover you may be confusing the line and the sample. Lines = height. Samples = width. |
| Forum: Image Processing Techniques · Post Preview: #217198 · Replies: 12 · Views: 15760 |
| Posted on: Jan 21 2015, 02:56 AM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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Probably better to link to a web-page rather than directly to a 500+,mb .pds file. http://dawndata.igpp.ucla.edu/tw.jsp?secti...Ms/DLR_HAMO_DTM Simply opening the file in a text editor reveals..... CODE PDS_VERSION_ID = PDS3 /* FILE DATA ELEMENTS */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 69124 FILE_RECORDS = 8644 LABEL_RECORDS = 2 /* POINTERS TO DATA OBJECTS */ ^IMAGE_HEADER = 3 ^IMAGE = 4 /* DATA OBJECT DEFINITIONS */ OBJECT = IMAGE INTERCHANGE_FORMAT = BINARY LINES = 8641 LINE_SAMPLES = 17281 SAMPLE_TYPE = IEEE_REAL SAMPLE_BITS = 32 BANDS = 1 BAND_STORAGE_TYPE = BAND_SEQUENTIAL MINIMUM = -21527 MAXIMUM = 19005 END_OBJECT = IMAGE /* MAP OBJECT DEFINITIONS */ OBJECT = IMAGE_MAP_PROJECTION A_AXIS_RADIUS = 255.0 B_AXIS_RADIUS = 255.0 C_AXIS_RADIUS = 255.0 CENTER_LATITUDE = 0.0 CENTER_LONGITUDE = 180.0 COORDINATE_SYSTEM_NAME = PLANETOCENTRIC EASTERNMOST_LONGITUDE = 359.9999991462263 LINE_PROJECTION_OFFSET = 4320.0 MAP_PROJECTION_TYPE = SIMPLE_CYLINDRICAL MAP_RESOLUTION = 48.00000026515721 MAP_SCALE = 0.09272061600000001 <km/pixel> MAXIMUM_LATITUDE = 90.0 MINIMUM_LATITUDE = -90.0 POSITIVE_LONGITUDE_DIRECTION = EAST SAMPLE_PROJECTION_OFFSET = 8640.0 WESTERNMOST_LONGITUDE = 0.0 END_OBJECT = IMAGE_MAP_PROJECTION /* MISCELLANEOUS */ TARGET_NAME = VESTA PRODUCER_INSTITUTION_NAME = "German Aerospace Center (DLR)" PRODUCT_CREATION_TIME = 2013-05-24T13:27:30.000 MISSING_CONSTANT = -32768 DESCRIPTION = "DTM: Height [m] equals DN. Vertical reference: Height above sphere/ellipsoid (as defined by map axis)." /* IMAGE HEADER DATA ELEMENTS */ OBJECT = IMAGE_HEADER HEADER_TYPE = VICAR2 INTERCHANGE_FORMAT = ASCII BYTES = 69124 ^DESCRIPTION = "VICAR2.TXT" END_OBJECT = IMAGE_HEADER END That data is enough to open it as a raw file in Photoshop, Gimp or ImageJ etc. and then use it as a displacement map on a mesh. |
| Forum: Image Processing Techniques · Post Preview: #217191 · Replies: 12 · Views: 15760 |
| Posted on: Jan 20 2015, 03:29 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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I'm afriad you're somehwat off on the main chute...and you've missed the backshell and drogue chute to the south. I wouldn't use the recent color image when feature hunting - I've personally found ESP_037145_1915 to be about the best. Here's my best estimation... the bright feature to the north could be either the heatshield interior or maybe the clamp band, I would not expect airbags to exhibit specularity as that feature does. I also wouldn't expect any hint of boucne marks. Try finding them at Gusev or Meridiani after 11 years. The backshell and drogue chute, the main chute, and Beagle 2 itself are pretty much no-brainers at this point. |
| Forum: Mars Express & Beagle 2 · Post Preview: #217165 · Replies: 65 · Views: 164689 |
| Posted on: Jan 19 2015, 04:30 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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My animation is NOT accurate. It was made as a student project 15 years ago, long before the Beagle 2 design was finalized. QUOTE Is this the first ever shot HIRISE image of the area? It really is very trivial to find HiRISE images. You could go to https://hirise.lpl.arizona.edu/ and search for Beagle ( 28 images ) You could load Google Earth, switch to Mars mode and turn on the HiRISE layer and find them there You could even just google for HiRISE Beagle 2 - take the first hit - http://hirise.lpl.arizona.edu/ESP_039308_1915 and read the text which explicitly states... Since the loss of Beagle 2 following its landing timed for 25th December 2003 a search for it has been underway using images taken by HiRISE camera on Mars Reconnaissance Orbiter (MRO). HiRISE has been taking occasional pictures of the landing site in addition to pursuing its scientific studies of the surface of Mars. The planned landing area for Beagle 2 at the time of launch was approximately 170 x 100 kilometers (105 x 62 miles) within Isidis Planitia. With a fully deployed Beagle 2 being less than a few meters across and a camera image scale of about 0.3 m (10 inches), detection is a very difficult and a painstaking task. The initial detection came from HiRISE images taken on 28 February 2013 and 29 June 2014 (see images ESP_030908_1915 and ESP_037145_1915). |
| Forum: Mars Express & Beagle 2 · Post Preview: #217123 · Replies: 65 · Views: 164689 |
| Posted on: Jan 16 2015, 11:17 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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That'll be the drogue chute flapping about - something like 1.5m across Lat long - 90.4295E 11.5265N |
| Forum: Mars Express & Beagle 2 · Post Preview: #217082 · Replies: 65 · Views: 164689 |
| Posted on: Jan 16 2015, 09:18 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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I don't think so.... if the Google Earth MOC layer is exhaustive and the ASU Global data search is similar exhaustive - it's definitely a no. http://viewer.mars.asu.edu/planetview/inst...1300632&T=2 got close - but http://viewer.mars.asu.edu/planetview/inst...2100301&T=2 is the only MOC NA image over the site - that that's corrupt and 9 months post landing |
| Forum: Mars Express & Beagle 2 · Post Preview: #217076 · Replies: 65 · Views: 164689 |
| Posted on: Jan 16 2015, 07:18 PM | |
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1
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So if we've got it on R1 and R2 from 037145, one red from another observation, plus the three colors ( IR, R and bG ) from the color catch... we sort of have 6 images of it. |
| Forum: Mars Express & Beagle 2 · Post Preview: #217070 · Replies: 65 · Views: 164689 |
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