!
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!
! SDDL Name: OFF_NOM_ROLL_TUNE_PARMS.SDDL
!
! Purpose: This include file contains off nominal roll tuning parameters
!
! Modification History:
!
! Date OPR Who Reason
! -------- ------- --- -------------------------------------------------
! 07/12/89 16196 SPSS Special Project 15.2,Off-Nominal Roll
! 12/14/94 27329 MRB Original SDDL implementation
!
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!
!
LANGUAGE FORTRAN
DESCRIPTION "off nominal roll tuning parameters. Loaded by name list
WRLTUN.NML"
!------------------------------------------------------------------------------
!
! FIELD INFORMATION
!
!------------------------------------------------------------------------------
INSTANCE wrlsunpntres
TYPE R*4
UNITS "DEGREES/ITER"
DESCRIPTION "this parameter specifies the step or resolution
of the change in the sun point angle for an
iteration by worolstep. this value should be set
to 1/2 the minimum distance between possible sun
angles. in other words, the minimum of:
wrlsunpntsf/2 or the smallest delta in sun point
angles/2. Therefore a recommended value is
0.125 degrees, (wrlsunpntsf/2). "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlrollres
TYPE R*4
UNITS "DEGREES/ITER"
DESCRIPTION "this parameter specifies the step or resolution
of the change in the v3 position angle for an
iteration by worolstep. a recommended value
is 1.0 degree per iteration. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlminsteptime
TYPE I*4
UNITS "SECONDS"
DESCRIPTION "this parameter specifies the minimum step
time that can be returned for an iteration
by worolstep. A recommended value is 3600
seconds. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlmaxsteptime
TYPE I*4
UNITS "SECONDS"
DESCRIPTION "this parameter specifies the maximum step
time that can be returned for an iteration
by worolstep. A recommended value is 86400
seconds. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlslopetime
TYPE I*4
UNITS "SECONDS"
DESCRIPTION "this parameter specifies an arbitrary initial
time delta to determine the slope of the nominal v3
position angle and the sun point angle
by worolstep. A recommended value is 3600
seconds. This value should not be set smaller than
60 seconds or greater than 1 order of magnitude less
than wrlmaxsteptime. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlscalefactor
TYPE R*4
DESCRIPTION "this parameter specifies the step or resolution
scale factor for an iteration by worolstep.
worolstep calculates a time when the roll and
sun point has not changed by wrlrollres and
wrlsunpntres. The scale factor is multiplied
by delta time to give a conservative time
estimate. a recommended value is 0.95. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrltimetol
TYPE I*4
DESCRIPTION "this parameter specifies the time tolerance
used in woroltrans to stop the iteration
search for the transition time. when the
bisection time span is less than the time
tolerance, the iteration is done. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlsunpntsf
TYPE R*4
UNITS "DEGREES"
DESCRIPTION "this parameter specifies a sun point safety
factor to be applied to the pdb roll data
for the solar array shadow, the tcs,
and the solar array incidence data.
this safety factor is used to adjust the
sun point data values by plus or minus this
safety factor to obtain a conservative value.
a suggested value is 0.25 degrees. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlrollsf
TYPE R*4
UNITS "DEGREES"
DESCRIPTION "this parameter specifies a roll safety
factor to be applied to the pdb roll data
for the solar array shadow, the tcs,
and the solar array incidence data.
this safety factor is used to adjust the
roll data values by plus this safety factor
to obtain a more conservative value.
a suggested value is 0.1 degrees. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE
INSTANCE wrlincsf
TYPE R*4
UNITS "DEGREES"
DESCRIPTION "this parameter specifies a solar array
incidence safety factor to be applied
to the allowable solar array incidence
angle. this safety factor is used to
adjust the solar array incidence angle
to obtain a more conservative value
because the x,y aperature offset is not
taken into account.
a suggested value is 0.1 degrees. "
GLOBAL off_nom_roll_tune_parms
END_INSTANCE