Level 2 Help for TRICOEF
ARCHIVE
The name of the IBIS archive containing the conformal and authalic
coefficients. If no archive exists one will be created with the name
provided via the ARCHIVE parameter. New archives have 1 column
and 1024 points/column. Each planet uses one column. Each column
is headed by the name of the planet provided via the PLANET parameter.
Default is: ARCHIVE=TRIAXIAL_ARCHIVE.IBIS
PLANET
Specifies the planet for which a model is desired. To later retrieve this
model the same planet name will be required. If no planet is specified
the coefficients are not saved in the archive.
RADIUS
Three planet radii (a,b,c) in arbitrary units.
where:
a = X radius (largest) defining prime meridian (longitude=0).
b = Y radius (middle) defining +90 degrees east longitude.
c = Z radius (smallest) defining spin axis.
If PLANET is specified RADIUS is not necessary since the planet radii
are retrieved from the SPICE. You can still specify RADIUS to either:
1. Change the radii for an existing planet.
2. Permit specification of a fictitious planet for testing purposes.
MLIMIT
Coefficient matrix width for modelling the longitude conversion.
Highly eccentric objects require more terms.
MLIMIT is typically about 6. The maximum is about 14.
KLIMIT
Coefficient array length for modelling the latitude conversion for
authalic only.
Highly eccentric objects require more terms.
NLIMIT is typically about 6. The maximum is about 14.
NLIMIT
Coefficient matrix width for modelling the latitude conversion.
Highly eccentric objects require more terms.
NLIMIT is typically about 6. The maximum is about 14.
TEST
(This is provided more as a test of the triaxtran subroutine than as a
test of the tricoef program.)
Test the coefficients just computed by calling the subroutine
TRIAXTRAN in every combination of lat/lon modes in all 8 octants of
the sphere. Default is NOTEST.
At the end of the program the coefficients will be re-read from the
catalogue and two points computed which can be checked against the
previously printed test. This verifies that the coefficients are
read properly.