Defects Index | Documentation Table of Contents
98/04/29 DEFECT in script setup_arcic.inp
SYMPTOM: New software package was working well in test runs done by
Mark, but compared poorly to IGR in most production runs
done by Orbiteers.
PROBLEM: Script setup_arcic.inp was written to handle four different
radiation pressure cases, including three terms labeled
"RADPR1 RADPR2 RADPR3", two terms labeled "RADPR1 RADPR2", and
two terms labeled "RADPR1 Y-BIAS". Script was mixing up the
second case with the first, creating/setting RADPR3 equal
to RADPR2 and RADPR2 equal to 0. This problem, encountered
in production, corrupted the a priori orbit beyond repair.
CORRECTION: Changed the two term "RADPR1 RADPR2" case so it is handled
like the two term "RADPR1 Y-BIAS" case. Changed the three
term case for a domino effect from the two term case. Tests
on all three ran successfully. Finally, changed the initiali-
zation of the RPVAL array from "1 0 0" to "1 0 1", to better
reflect the affinity between the first and third radiation
pressure terms in the ROCK4 model.
FOUND BY: Dulaney 98/04/24
FIXED BY: Dulaney 98/04/27
SOURCE: /proc/gl/Scripts_new (Buster)
June 25, 1999