Chandra orbit: latest info

Jonathan McDowell (jcm@head-cfa.harvard.edu)
Sat, 24 Jul 1999 17:24:20 -0400 (EDT)

Hi,
 I only just regained access to Seesat-L so I don't know if
Ron Lee already posted this orbit. I obtained the following
Chandra orbit data from the Chandra control room folks - I hope someone
can generate TLEs from these.

Post IUS orbit (where we are now)

Epoch 99204 13:48:51
Alt  330.23 x 72030.56 x 28.4528
SMA  42558.527
Ecc 0.842373
Inc 28.4528
RAAN 196.2671
AOP  270.0155
True Anom 119.3190
Mean Anom 14.5069
Period 24.2710 hr

Planned post IPS 1 orbit (after 9.11pm EDT this evening)

Alt 1200 x 72023  x 28.44

SMA 42990.1355
ecc   0.823711
Inc 28.4448
RAAN 196.0098
AOP 270.3411
Mean Anom 180.5498  (no epoch given!)
Period 24.6412 hr

Burn times currently planned:

IPS-1  206/01:11:27  for 5min 00 sec
IPS-2  207/01:45:05 duration 11:03
IPS-3  212/22:27:21 for 21:07
IPS-4  214/04:46:30 for 11:23
IPS5   216/20:27:07 for 01:45

Chandra is stable and returning data, but the data obtained
through Diego Garcia is apparently a little ratty, we are
eager to get to our final orbit since the DSN is better
configured for us. Instruments appear to be healthy.

 - Jonathan McDowell
   Chandra X-ray Center