----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
ACCELT3 7603901 1.80D-12
----+----0----+----0----+----0----+----0----+----0----+----0----+----0----+----0
COLUMNS FORMAT DESCRIPTION DEFAULT VALUE & UNITS
1-6 A6 ACCELT - Requests application and/or
adjustment of general accelerations
in three dimensions. This is a
special option that may be used to
simulate thrusting by applying
accelerations in the alongtrack, crosstrack
and radial directions at the same time.
SPECIAL CARE is required in using this
option because the input must be in a
very specific order. (See the sample setup)
7 I1 Acceleration type 0
1 - Radial
2 - Crosstrack
3 - Alongtrack
18-24 I7 Satellite ID (required). 0
25-44 D20.8 A priori value of acceleration. 0. M/S**2
45-59 D15.3 End time of the period for which
this acceleration coefficient applies
in the form YYMMDDHHMMSS.SS
JUNE 1989
8906.0
ARC SET - Option Cards
ACCELT (cont)
COLUMNS FORMAT DESCRIPTION DEFAULT VALUE & UNITS
60-72 D13.1 A priori sigma of acceleration 0. M/S**2
coefficient. or M/S**3
or M/S**4
NOTES:
[1] This option is not user friendly. The input cards must be in the
order shown in the example on the next page. All of the cards
pertaining to the alongtrack acceleration come first, followed by the
cards pertaining to the crosstrack acceleration, followed by the
cards pertaining to the radial accelerations. The times on the
alongtrack cards are the only times that are used, however,
times are required on the crosstrack and radial cards.
The times must be in ascending order and all times specified must be
within the run times specified on the EPOCH card or GEODYN IIS will
throw them out.
UNITS: KM =Kilometers; M =Meters ; S =Seconds ; Kg =Kilograms
DEG=Degrees ; RAD=Radians ; AS =Arc seconds; MAS=Milli-arc seconds
IF CARD OMITTED: General accelerations are not applied.
JUNE 1989
8906.0
ARC SET - Option Cards
ACCELT (cont)
Sample ACCELT Setup
Following is a set of ACCELT cards used to apply two
thrusting type of accelerations (thrusting in the sense that the
accelerations are zero prior to and after the acceleration interval).
----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
ACCELT3 7603901 0.0
ACCELT3 7603901 0.0 911007020000.00
ACCELT3 7603901 1.000E-06911007020200.00
ACCELT3 7603901 0.0 911007040000.00
ACCELT3 7603901 1.000E-06911007040200.00
ACCELT3 7603901 0.0 911007060000.00
ACCELT2 7603901 0.0 911017020000.00
ACCELT2 7603901 1.000E-06911017020200.00
ACCELT2 7603901 0.0 911017040000.00
ACCELT2 7603901 1.000E-06911017040200.00
ACCELT2 7603901 0.0 911017060000.00
ACCELT1 7603901 0.0 911027020000.00
ACCELT1 7603901 1.000E-06911027020200.00
ACCELT1 7603901 0.0 911027040000.00
ACCELT1 7603901 1.000E-06911027040200.00
ACCELT1 7603901 0.0 911027060000.00
----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
Notice that the first card does not have a time period specified
and that the times for the crosstrack (2) and radial (1) cards have been
increased by 10 days. This will require that the end time specified on
the EPOCH card be 20 days later.
Note that when this option is used, GEODYN IIE will print the
thrusting acceleration vector in m/(sec**2) at integration steps where
the thrusting vector has a magnitude of larger than 1.0E-7(m/sec**2)
JUNE 1991
9106.0
ARC SET - Option Cards