RE: Chandra orbit

Ted Molczan (molczan@home.com)
Mon, 26 Jul 1999 13:49:22 -0400 

Jonathan McDowell wrote:

> Chandra Orbit Controller sent me the following
> state vector in km, km/s:
>
> 25 Jul 1999 13:00:00.0000 UTC
> 14341.781689, 3200.342466, 471.524974
>  -5.199520, 3.387636, -2.539670
> Geocentric cartesian J2000
>
> This is the DSN-based post-IPS-1 orbit.
> Note the Space Command orbit (from independent data) is
>
> 1 25867U 99040B   99206.05347222 -.00000025  00000-0  00000+0 0    78
> 2 25867  28.4406 196.0256 8242614 270.3420 180.3395  0.97337724    32
>
> Can someone vec2tle the state vector so we can compare them?
>   Jonathan McDowell

I obtained the following:

                STATE VECTOR DEOSCULATION TO TWO-LINE ELEMENTS

                              Input State Vector:

                      - X -                - Y -              - Z -
 <Position>:        14341.78169           3200.34247          471.52497  km
 <Velocity>:      -5.1995200000         3.3876360000      -2.5396700000
km/s

       Time:  1999 206/13:00:00.000

 Inertial Reference: True Equinox, True Equator of Date
        Vector Type: Earth-Centered Inertial (ECI)


                              Two-Line Elements:

     Chandra
     1 25867U 99040B   99206.54166667  .00000000  00000-0  00000-0 0    11
     2 25867  28.4430 195.9761 8244389 270.3796 351.4282  0.97204430    05