"WISE has arrived and is almost ready to go," said William Irace, the mission's project manager at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "After we check the spacecraft out and fill the telescope cooling tanks with solid hydrogen, we'll mate it to the rocket and launch."
How is the cryostat loaded with solid hydrogen? I am anticipating that this is done by loading the tank with liquid hydrogen, which boils at 20.3K, followed by pumping away of the gaseous hydrogen above the liquid to cool the remaining hydrogen to solid state at 14K (atmospheric).How soon does this have to happen before the payload is installed on the Delta II? I'm guessing that heat load prior to launch may be quite important, or is the insulation on the cryostat good enough that this is not critical?
The Kennedy link shown in the presser is just a general page, the specific page for the mission blog is at:http://www.nasa.gov/mission_pages/WISE/launch/launch_blog.htmlI wondered why Kennedy site would have a blog for a Vandenberg launch.
Reports suggest the delay is due to a problem with a "booster steering engine". Not sure if that refers to TVC or RCS.
Quote from: butters on 12/10/2009 09:54 pmReports suggest the delay is due to a problem with a "booster steering engine". Not sure if that refers to TVC or RCS. My first guess is a vernier engine or a the main engine. Is steering a proper term for LV function?
How are you getting these sharp clear views from Chris? My NTV is blurry even on the 1200 feed, and the ULA feed is only slightly better.
Huzzah! They have good weather balloon data for upper level winds
11,000 mph - this vehicle doesn't hang about does it!
That's all we're getting for a while.
Quote from: Chris Bergin on 12/14/2009 01:33 pmThat's all we're getting for a while.Well, it would be better to have a coast phase jazz music...
Vehicle has been acquired by a TDRSS.
Good separation orbit parameters.Woo hoo, this means my GSE/LSE, and the best damned spacecraft tech in the business will be back at the office in a few days. :-)
Quote from: jimvela on 12/14/2009 02:08 pmGood separation orbit parameters.Woo hoo, this means my GSE/LSE, and the best damned spacecraft tech in the business will be back at the office in a few days. :-)Congrats Jim!
The most flown US launch vehicle of 2009. A shame it will go away soon, to be replaced by ... new vehicles offering nothing new other than being unproven.Analyst
For twice the price tag.Analyst
Some more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983;
Quote from: jcm on 12/14/2009 01:26 pmSome more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983;With regards to the underlined text above: That's a load of BS. The last infrared all sky survey was not IRAS in 1983, but the Japanese Akari mission (the former ASTRO-F) from February 2006 to August 2007. The first infrared all-sky survey was IRAS in 1983. More than 20 years later, the Japanese did a much better survey, making good use of the vastly improved IR sensor technology.
Quote from: jcm on 12/14/2009 01:26 pmSome more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983; With regards to the underlined text above: That's a load of BS. The last infrared all sky survey was not IRAS in 1983, but the Japanese Akari mission (the former ASTRO-F) from February 2006 to August 2007. The first infrared all-sky survey was IRAS in 1983. More than 20 years later, the Japanese did a much better survey, making good use of the vastly improved IR sensor technology. WISE, in it's current form is basically re-doing Akari, less than 3 years later, but concentrating more on the shorter wavelengths within the Infrared part of the spectrum and higher sensitivity.I find the fact that NASA is conveniantly overlooking Akari slightly annoying.
Quote from: woods170 on 12/14/2009 06:45 pmQuote from: jcm on 12/14/2009 01:26 pmSome more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983; With regards to the underlined text above: That's a load of BS. The last infrared all sky survey was not IRAS in 1983, but the Japanese Akari mission (the former ASTRO-F) from February 2006 to August 2007. The first infrared all-sky survey was IRAS in 1983. More than 20 years later, the Japanese did a much better survey, making good use of the vastly improved IR sensor technology. WISE, in it's current form is basically re-doing Akari, less than 3 years later, but concentrating more on the shorter wavelengths within the Infrared part of the spectrum and higher sensitivity.I find the fact that NASA is conveniantly overlooking Akari slightly annoying.Ouch. I did forget Akari. The Akari source catalog has of course not yet been publicly released (as far as I can telll) so at this moment IRAS is still the only all sky survey available to the community. That's not meant to be a complaint - it took us years to do the Chandra catalog which just came out a few months ago. I think the combined Akari and WISE datasets will be very exciting, and I apologize to my Japanese and European colleagues for overlooking them. (At least I did nod to ISO and Herschel). Mea maxima culpa. - Jonathan