orbit transfer
to
Propulsion calibration software shall be compatible with
software in order the corresponding ensure a smooth and accurate transition between transfer orbit, drift orbit, and on-station operation.
6.1.5 Eclipse Prediction
The Eclipse
the
Prediction software
shall be
It
of
as seen
shall
capable predicting all earth and moon eclipses of the sun as
it's satellite during
entire life. by describe each eclipse in terms of entry and exit of both the penumbra and umbra, and shall specify the maximum obscuration of the sun.
6.1.6 Satellite Position Prediction
The
generation ephemerides. of prediction:
prediction general
software shall
capable of As a minimum, it should be capable
be
i)
orbital elements and attitude vectors;
ii)
satellite latitude and longitude;
iii)
antenna pointing angles ground system.
for any antennas in the
6.1.7 Propagation of Orbit and Attitude
The method for propagating the orbital elements and the attitude shall be
to common
both the estimation and prediction software. It must include all normal geostationary pertubations sufficient to satisfy required stationkeeping accuracy and consistent with minimizing fuel usage over the life of the satellite.
6.2 System Design Requirements
6.2.1 Operating Staff
the
The software shall be designed in such a way as to require (2) trained analysts to control the
no more
than two
dynamics of the satellite.
6.2.2 Language
be
All elements of the stationkeeping subsystem shall written in a current computer-manufacturer supported version of a high level language (e.g. FORTRAN IV, ALGOL, PASCAL), in a well-structured, modular fashion. Sufficient
shall be included comments
in in the source to make the individual programs self-documenting. The documented source code shall be delivered if permitted.
6.2.3 Coordinate Systems
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