>>> Has anyone here started to look into the potential of viewing some of >>> the insertion burns for the upcoming Chandra (formerly AXAF) X-Ray >>> observatory deployment on STS-93? >>> >>> Bill Moore Ron Lee <firstname.lastname@example.org> said: >Here is where I am at a loss. I have ZERO data on the orbit and ZERO >info on the burn times. That adds up to almost no chance to tell >people when and where to look. Perhaps Mr Chien can correct the >lack of info. Well, I would if people would still call it AXAF instead of Chandra ... (Who me bitter that they didn't select the name I proposed - nah!) >The IUS was under investigation due to failure placing a DSP into orbit. >I have not seen anything that clears the IUS for flight. If it is not >cleared, I suspect the Chandra flight will be delayed. While the Air Force investigation on DSP-19/IUS-21 is ongoing the IUS-27 for AXAF has been cleared for flight with launch planned for July 20th at 12:36 am EDT. (4:36 UT). Here's the predicted shuttle orbit for the AXAF/IUS deploy - STS-93 OMS-2 1 99993P 99201.22870020 .00018250 13934-8 44256-4 0 14 2 99993 28.4662 199.3456 0003191 302.7331 301.7244 15.95038814 15 Here's the key events - 07 h 17 m AXAF deploy from the shuttle 08 h 17 m IUS stage 1 ignition 08 h 19 m IUS stage 1 burnout 320 x ??? km. orbit - I can probably figure this out based on the amount of propellant in the first IUS stage 08 h 22 m IUS stage separation 08 h 23 m IUS stage 2 ignition 08 h 24 m IUS stage 2 shutdown 320 x 64000 km. orbit, 28.5 degree inclination Surprisingly the online shuttle press kit at http://www.shuttlepresskit.com actually has a decent amount of information. With a bit of effort I could probably precess the orbits and determine where the burns take place. Philip Chien, KC4YER Earth News world (in)famous writer, science fiction fan, ham radio operator, all-around nice guy, etc.