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RXTE sun-pointing constraints

RXTE spacecraft axes. The roll angle is defined as a
clockwise rotation around the pointing (X-) axis. The roll
offset or roll bias is the angle between the X-Z
plane and the sun vector; this angle is shown above, constrained to the
initial post-launch range of +/-5 degrees. The default roll offset is now
calculated as a function of sun-source angle, and can be as much as -30
degrees, as shown below.
Default RXTE roll angle as a function of sun-source angle
(Postscript)
HEXTErock
- HEXTE background positions on the sky.
High Energy X-ray Timing Experiment
Send questions or comments to Philip Blanco
pblanco@ucsd.edu