RE: Chandra orbit: latest info

Ted Molczan (molczan@home.com)
Sat, 24 Jul 1999 17:57:54 -0400

Jonathan McDowell wrote:

> 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

Here is the Post IUS orbit:

Chandra         15.0  4.0  0.0  4.2 d
1 25867U 99040  B 99204.57559028  .00000000  00000-0  00000-0 0    08
2 25867  28.4528 196.2671 8423730 270.0155  14.5069  0.98883441    08

> 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

The following elset is for the Post IPS burn. I set the epoch to immediately
after the IPS 1 burn, i.e. day 206, 01:16:27 UTC, but that may not be
correct.

Chandra         15.0  4.0  0.0  4.2 d
1 25867U 99040  B 99206.05309028  .00000000  00000-0  00000-0 0    06
2 25867  28.4448 196.0098 8237110 270.3411 180.5498  0.97397854    00

Ted Molczan