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SEDSAT-1 Estimated Keplerian Elements



The following orbital data was estimated based on orbital information
received from Dr. Mark W. Maier of the University of Alabama in Huntsville.
>From this I derived the Earth-fixed, time-independent state vector listed
below.  Note that 90001 is a temporary catalog number and that a permanent
catalog number and international designator will be assigned once SEDSAT-1
is launched.

Vector format = 10107
Satellite Name:         SEDSAT-1
Catalog Number:         90001
Epoch MET:                  0.06134259300
                           0/01:28:20.000 MET
EFG E:                   -4901.4567450000 km
    F:                   -4417.4223220000 km
    G:                   3536.54707700000 km
    Edot:                4.92099969200000 km/s
    Fdot:                -4.2337016110000 km/s
    Gdot:                1.61583736200000 km/s
ndot/2 (drag):              0.00000214743 rev/day^2
nddt/6:                       0.00000E+00 rev/day^3
Bstar:                        4.38589E-05 1/Earth Radii
Elset #:                                1
Rev @ Epoch:                2.17799158319

The Keplerian elements are based on the nominal launch time of 1998-OCT-22
at 12:00 UTC.  The Two-Line and AMSAT formats are listed below.

SEDSAT-1
1 90001U          98295.56134259  .00000215  00000-0  43859-4 0    13
2 90001  31.5103  33.8627 0402839 252.7761 171.3099 14.19599696    21

Satellite: SEDSAT-1
Catalog number: 90001
Epoch time:      98295.56134259
Element set:       1
Inclination:       31.5103 deg
RA of node:        33.8627 deg
Eccentricity:    0.0402839
Arg of perigee:   252.7761 deg
Mean anomaly:     171.3099 deg
Mean motion:   14.19599696 rev/day
Decay rate:    2.14743e-06 rev/day^2
Epoch rev:               2
Checksum:              300

If the launch date or time changes, the updated Keplerian elements can be
computed by inputting the above state vector into VEC2TLE and providing the
new launch date and time.  Questions or comments should be directed to Ken
Ernandes, N2WWD at the email address listed below.

Ken Ernandes
n2wwd@amsat.org
http://www.mindspring.com/~n2wwd






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