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Del Palmer
Posted on: Jul 30 2008, 09:54 PM


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QUOTE (dmuller @ Jul 30 2008, 07:12 AM) *
Just out of curiosity ... does the JPL have backup mission control centers somewhere in the US?


I don't believe they do, but it sounds like all mission teams have a contingency plan for earthquakes. Here's the Cassini plan (extract taken from the Cassini website in 1999):

QUOTE
A Major Earthquake in California. Yes, we even have plans for this goblin! If a major earthquake were to strike, communication lines between JPL and the remote Deep Space Network, which we use to communicate to the spacecraft, might be broken for hours to possibly days. And with a probability of about 2 percent per year of a "major" earthquake, we'd better be ready for it if it happens. Our strength in this area is Cassini's distributed network, with scientists planning observations all over the country. The spacecraft sequence files, not to mention the science observations, will be stored in more than one location. Of course, after an earthquake we'd have to make sure our operations team can get somewhere secure to continue to plan spacecraft events, but with sequences being 28 days long, it's likely we'll have some time to recover and get a team to develop the next 28-day sequence before the current sequence ends.

  Forum: Chit Chat · Post Preview: #121814 · Replies: 310 · Views: 232117

Del Palmer
Posted on: Jul 27 2008, 04:20 PM


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QUOTE (Hungry4info @ Jul 26 2008, 06:05 PM) *
I think this is what we find at Tau Bootis.


Although tau Bootes is a likely candidate for magnetic interaction, it doesn't appear to be obvious in observations. It is suspected that the low relative velocity between the star and planet would not induce an appreciable current.
  Forum: Telescopic Observations · Post Preview: #121546 · Replies: 181 · Views: 179740

Del Palmer
Posted on: Jul 27 2008, 04:02 PM


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QUOTE (Juramike @ Jul 26 2008, 05:45 PM) *
[EDIT: I meant magnetic effects, like Io's effect on Jupiter's magnetic field.]


The planet could well be inside the Alfven radius (the region where Alfven waves would transport large amounts of energy along field lines). Star-planet magnetic interaction would be seen as chromospheric enhancement, and such has been observed for HD 179949. COROT could answer this question itself by following-up the discovery with chromospheric observations.

  Forum: Telescopic Observations · Post Preview: #121543 · Replies: 181 · Views: 179740

Del Palmer
Posted on: Jul 26 2008, 09:55 PM


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Nick, I have the same question. At first I thought it was a broadcast model where one user updates many others. But reading a recent Cassini report suggested it was more like an instant-messaging service ("For Cassini, the user submits a question or message and members of the flight team respond from the perspective of the spacecraft.") Even more confused now...
  Forum: New Horizons · Post Preview: #121501 · Replies: 211 · Views: 277816

Del Palmer
Posted on: Jul 25 2008, 04:50 PM


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QUOTE (Mongo @ Jul 25 2008, 04:50 PM) *


I'd say it was badly worded. It is, after all, the longest period for any transiting exoplanet ever found via the transit technique. There are other transits with longer periods (such as the one you reference) but all of those were first found by radial velocity searches, and then analyzed for transit solutions.

  Forum: Telescopic Observations · Post Preview: #121400 · Replies: 181 · Views: 179740

Del Palmer
Posted on: Jul 8 2008, 01:56 AM


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QUOTE (jmknapp @ Jul 8 2008, 02:38 AM) *
Some surprising detail brought out there--it looks to me like there are small clouds casting shadows on the surface. Can that be right? They could be little hills I suppose.


They look like puffy water-ice clouds; here's a similar image from Icaria Planum.


  Forum: Mars · Post Preview: #120124 · Replies: 13 · Views: 14293

Del Palmer
Posted on: Jul 7 2008, 12:00 PM


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QUOTE (Ipparchus @ Jul 7 2008, 08:49 AM) *
Do you know when are they going to use the Atomic Force Microscope?


Probably real soon now. From Mark Lemmon's raw images page:

Sol 042: Clean and scrape Wonderland, AFM checkout part 1
  Forum: Phoenix · Post Preview: #120078 · Replies: 133 · Views: 136965

Del Palmer
Posted on: Jul 6 2008, 09:47 PM


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Yup, it's a great shame that the UNEX program was canned. Perhaps cheaper access to space (I gather NanoSail-D and Presat are getting a ride on SpaceX's Falcon 1) will cause NASA to reconsider a UNEX-like program.

Quick geek factoid: CHIPSat was the first satellite to use TCP/IP for communication with Earth.

  Forum: Telescopic Observations · Post Preview: #120049 · Replies: 2 · Views: 4109

Del Palmer
Posted on: Jul 5 2008, 06:52 PM


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QUOTE


Earth-like planets? blink.gif According to their paper, their detection sensitivity would be limited to Jupiter-like planets...

  Forum: Telescopic Observations · Post Preview: #120006 · Replies: 10 · Views: 14878

Del Palmer
Posted on: Jul 2 2008, 04:20 PM


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SOFIA's primary mirror receives coating; ready for installation.

http://www.sofia.usra.edu/News/news_2008/06_20_08/index.html

  Forum: Telescopic Observations · Post Preview: #119788 · Replies: 16 · Views: 23270

Del Palmer
Posted on: Jul 1 2008, 05:04 PM


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QUOTE (jasedm @ Jul 1 2008, 01:53 PM) *
3) Not worried at all - Jase should stop being a panic-merchant and lie down in a darkened room with a beer and some soothing music unsure.gif


That sounds like a great option, regardless of the outcome! smile.gif


  Forum: Cassini general discussion and science results · Post Preview: #119715 · Replies: 3 · Views: 6692

Del Palmer
Posted on: Jul 1 2008, 05:01 PM


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QUOTE (ElkGroveDan @ Jul 1 2008, 05:55 PM) *
"Figure 1: Pallas imaged by HST in 336nm UV filter."


Dan, great find! smile.gif Have not seen that in the raw data archives...

  Forum: Dawn · Post Preview: #119714 · Replies: 285 · Views: 337413

Del Palmer
Posted on: Jul 1 2008, 04:56 PM


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QUOTE (3488 @ Jul 1 2008, 04:42 PM) *
No decent Hubble Space Telescope images exist of 2 Pallas do they, or have I not been able to find them?


Depends what you mean by "decent." wink.gif I don't recall seeing any press release images of Pallas from STScI, but there is a set of WFPC2 images in the MAST archive. Looks like they were taken using gyro-guiding, and so the targeting was a little off...

  Forum: Dawn · Post Preview: #119713 · Replies: 285 · Views: 337413

Del Palmer
Posted on: Jun 24 2008, 10:09 PM


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QUOTE (marsbug @ Jun 24 2008, 09:52 PM) *
...but I've heard nothing about the second two, going up to 1000 degrees. Did the other problems lead to them being cancelled?


My guess would be that the science team is waiting to be allowed to use the Flash memory again (real soon now) before reading-out such important data (which you wouldn't want to trust to the vagaries of volatile memory).

  Forum: Phoenix · Post Preview: #119121 · Replies: 405 · Views: 222837

Del Palmer
Posted on: Jun 22 2008, 04:32 PM


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QUOTE (dvandorn @ Jun 22 2008, 05:08 PM) *
Then we find a population of bodies that does *not* fall neatly into that ecliptic plane. What is the most natural conclusion to be drawn from that? The conclusion I draw is that the accretion disk had ceased to be a flat disk by the time we got out that far from the sun. Lack of tidal forces and all that.


Er, not quite. You need a lot of energy to escape the ecliptic plane. Those high-inclination bodies are known as "scattered-disk" objects -- they were most likely formed in the ecliptic plane but were gravitationally tossed into such odd orbits by Neptune.

QUOTE
Just as the farther-out shell of cometary debris, the Oort cloud, has.


Likewise, those objects are believed to have been put there by Jupiter and Saturn...
  Forum: Pluto / KBO · Post Preview: #118917 · Replies: 58 · Views: 84375

Del Palmer
Posted on: Jun 20 2008, 01:05 PM


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QUOTE (jekbradbury @ Jun 20 2008, 12:57 AM) *
I wonder why a greater percentage of images than usual are suffering from data loss in transit. Is this a Phoenix, Odyssey, MRO, or DSN problem?


Due to the Flash anomaly, they've added extra UHF passes. Perhaps some of these extra passes are less than optimal (low elevation etc.).

  Forum: Phoenix · Post Preview: #118668 · Replies: 355 · Views: 224003

Del Palmer
Posted on: Jun 16 2008, 11:49 PM


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This ESO release suggests that 1-in-3 Sun-like stars have such super-Earths, so there are a lot more to come.

Exciting times indeed. smile.gif


  Forum: Telescopic Observations · Post Preview: #118372 · Replies: 10 · Views: 9427

Del Palmer
Posted on: Jun 12 2008, 01:42 PM


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QUOTE (nprev @ Jun 11 2008, 11:51 PM) *
Sure wish Phoenix had a relative humidity sensor (ideally at the end of the arm!), but I can't even imagine how to build one for Martian conditions.


So what's wrong with TECP's relative humidity sensor? wink.gif
  Forum: Phoenix · Post Preview: #117929 · Replies: 207 · Views: 134528

Del Palmer
Posted on: Jun 11 2008, 03:19 PM


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That's the Organic-Free Blank.
  Forum: Phoenix · Post Preview: #117814 · Replies: 207 · Views: 134528

Del Palmer
Posted on: Jun 9 2008, 09:34 PM


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They also mention that it has a "black hole." Perhaps they need to increase the Schwarzschild radius to allow particles to pass into the oven? wink.gif


  Forum: Phoenix · Post Preview: #117643 · Replies: 207 · Views: 134528

Del Palmer
Posted on: Jun 7 2008, 04:09 PM


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The anisotropy of the anisotropy. smile.gif Intriguingly, this WMAP cold spot is centered on the VLA's discovery of a 'cosmic void.' I wonder if a bubble collision wiped out the galaxies that were present in that region?

Alternatively, it's interesting that the coldest and hottest spots in the CMB correspond to the Milky Way's plane, so perhaps the aniostropy merely comes from dust extinction... blink.gif


  Forum: Telescopic Observations · Post Preview: #117354 · Replies: 1 · Views: 3764

Del Palmer
Posted on: Jun 5 2008, 08:20 PM


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There's a neat video on YouTube that explains the principals behind the idea.



  Forum: Earth Observations · Post Preview: #117151 · Replies: 1 · Views: 5697

Del Palmer
Posted on: May 28 2008, 04:16 PM


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QUOTE (jamescanvin @ May 28 2008, 03:22 PM) *
However I have chucked the results on the web if it is any help to anyone:

http://www.nivnac.co.uk/phoenix/raws/


Forget Rob Manning -- you're my new hero! smile.gif The Zip file is a huge time-saver; constantly right-clicking to save hundreds of images was getting a little old...

  Forum: Phoenix · Post Preview: #115935 · Replies: 42 · Views: 45582

Del Palmer
Posted on: May 21 2008, 08:06 PM


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QUOTE (dvandorn @ May 21 2008, 08:50 PM) *
Speaking of "The Sky at Night," is there any way to get BBC-America to start running it? I appreciate being able to watch Torchwood and Dr. Who on BBC-A, but it would be great if we could get TSAN to us Americans, too!


Are you able to watch online on this page (I understand the BBC does sometimes block IP addresses that originate outside the UK)?

Another way to get it would be to buy the accompanying magazine, which has a cover CD containing the full TV episodes in MPEG-1 format.
  Forum: Phoenix · Post Preview: #114182 · Replies: 38 · Views: 30070

Del Palmer
Posted on: May 19 2008, 10:00 PM


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Under contract from NASA, Rochester Institute of Technology is developing an imaging LIDAR for planetary mapping. Swaths of entire scenes with an accuracy of 1 cm?! Sweet!


  Forum: Mars · Post Preview: #113975 · Replies: 4 · Views: 7512

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