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First HiRISE Images Coming Soon!, test images to be taken week of March 20
Guest_AlexBlackwell_*
post Mar 13 2006, 06:49 PM
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QUOTE (Phil Stooke @ Mar 12 2006, 04:25 PM) *
By a happy coincidence your simulation date of 15 March is my birthday. I'll take this as a birthday card!

Happy Birthday, Phil biggrin.gif But remember what the soothsayer said to Caesar: "Beware the Ides of March." Julius Caesar (Act I, Scene II).
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Phil Stooke
post Mar 17 2006, 05:33 PM
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Well, Alex, I bewore the Ides of March as instructed... but nothing happened.

Phil


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Guest_AlexBlackwell_*
post Mar 17 2006, 06:48 PM
Post #33





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QUOTE (Phil Stooke @ Mar 17 2006, 05:33 PM) *
Well, Alex, I bewore the Ides of March as instructed... but nothing happened.

I guess you didn't get the present labeled: "To Phil from your old pals Brutus and Cassius."
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Bob Shaw
post Mar 17 2006, 11:34 PM
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QUOTE (AlexBlackwell @ Mar 17 2006, 06:48 PM) *
I guess you didn't get the present labeled: "To Phil from you old pals Brutus and Cassius."


Alex:

Phil, liking British comedy as he does, probably took the Kenneth Williams option:

'Infamy! Infamy! They've all got it infamy!'

Ooh, er, Matron!

Bob Shaw


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Phil Stooke
post Mar 18 2006, 05:49 PM
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Actually Frankie Howerd is the person I think of in connection with such classical goings-on. My apologies to all the non-brits out there whose upbringing didn't include frequent exposure to the cream of British culture. It is - uh - cream that floats to the top, isn't it?

Phil


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Toma B
post Mar 21 2006, 11:33 AM
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"test images to be taken week of March 20"
Are they just going to snap few images of anywhere on Mars or is there some specific target for those test images...
If they asked me I would take image of Opportunity’s way to Victoria...that could help a bit in navigating through those dunes...
Does anybody knows more?


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MahFL
post Mar 21 2006, 11:57 AM
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You don't just "snap anywhere" with a multi million $ camera..................
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ugordan
post Mar 21 2006, 12:03 PM
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QUOTE (MahFL @ Mar 21 2006, 12:57 PM) *
You don't just "snap anywhere" with a multi million $ camera..................

True, but the uncertainties in MOI burn performance can lead to large differences in what part of Mars will be under you during, say, 10th periapsis passage. This limits and possibly prevents any extensive planning before MOI on what targets you'll get to see.
So in a sense, they might just be "snapping anywhere", pointing nadir and catching whatever is below. It's an engineering test anyway, not scientific observation.
Once they get into their science orbit they'll have much more accurate ephemeris and be able to actually target their observations.


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Cugel
post Mar 21 2006, 12:22 PM
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It's going to be March 23! Images will be taken during 2 orbits. The camera will take pictures of the middle latitudes of the southern hemisphere. (From space.com)
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SteveM
post Mar 21 2006, 01:17 PM
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QUOTE (Cugel @ Mar 21 2006, 07:22 AM) *
It's going to be March 23! Images will be taken during 2 orbits. The camera will take pictures of the middle latitudes of the southern hemisphere. (From space.com)
Does anyone know where they'll be found? I can't find any obvious links at JPL, Ames, or the Univ. of Arizona.
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djellison
post Mar 21 2006, 01:24 PM
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They'll be unveiled at HiROC in a special event if you look at the hiroc website.

Doug
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ljk4-1
post Mar 21 2006, 02:00 PM
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I hope they'll get some shots of those canals I keep hearing everyone
talk about. Maybe even some of those ancient Martian cities along the
planet's equator made of solid crystal, or even the giant cannon they
used to launch that Earth invasion back in 1897 - and 1953 - and 1988 -
and 2005.

cool.gif


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I see that such intercourse long continued would make one thoroughly prosaic, hard,
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jmknapp
post Mar 21 2006, 03:23 PM
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Interestingly enough, per the latest SPICE prediction kernel MRO won't have a periapsis passage on March 23rd UTC. There will be a periapsis around ~5:00am UTC on the 24th, which would be the 23rd Mountain Time at least.

MRO will be over the night side at periapsis so I guess the HiRISE images will be taken some time before, at higher altitudes? Here's the nadir track showing MRO as a red dot at 04:50am March 24th UTC, just going into the night side:



Altitude at that point is about 1500km. Altitude when MRO is over the Valles Marineris region is about 4000km at 04:30.


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ugordan
post Mar 21 2006, 04:04 PM
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QUOTE (jmknapp @ Mar 21 2006, 04:23 PM) *
Interestingly enough, per the latest SPICE prediction kernel MRO won't have a periapsis passage on March 23rd UTC.

Is that the prediction based on actual orbit elements reconstructed after MOI or an a priori best-guess value?


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jmknapp
post Mar 21 2006, 04:12 PM
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QUOTE (ugordan @ Mar 21 2006, 11:04 AM) *
Is that the prediction based on actual orbit elements reconstructed after MOI or an a priori best-guess value?


Since it came out on March 20th I would think the former. Here's a bit of the lbl file:

QUOTE
MISSION_NAME = "MARS_RECONNAISSANCE_ORBITER"
SPACECRAFT_NAME = "MARS_RECONNAISSANCE_ORBITER"
DATA_SET_ID = "SPICE_SPK_FILE"
KERNEL_TYPE_ID = "SPK"
PRODUCT_ID = "spk_ab_ref060320_060312_060914_p-v1.xsp"
PRODUCT_CREATION_TIME = 2006-03-20T08:47:06
PRODUCER_ID = "MRO_NAV_TEAM"
MISSION_PHASE_NAME = "CRUISE"
PRODUCT_VERSION_TYPE = "SPK-SFDU"
PLATFORM_OR_MOUNTING_NAME = "N/A"
START_TIME = 2006-03-12T09:38:55
STOP_TIME = 2006-09-14T04:25:19


Obviously most of file is based on prediction, since it covers the entire aerobraking phase out to September 14.


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