----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
EPHEM 200
----+----0----+----0----+----0----+----0----+----0----+----0----+----0----+----0
COLUMNS FORMAT DESCRIPTION DEFAULT VALUE & UNITS
1-6 A6 EPHEM - Tells GEODYN which ephemeris
is being input on unit #1. This
card is required to select the
DE118 ephemeris and is optional
for the DE96 and DE200 ephemerides.
15-17 I3 Ephemeris indicator as follows: 200
= 96 - DE96 ephemeris using mean
equator and equinox of 1950
and Woolard's nutations
series.
=118 - DE118 ephemeris using mean
equator and equinox of 1950
coordinates and Wahr's
nutations series.
=200 - DE200 ephemeris using mean
equator and equinox of 2000
coordinates and Wahr series
nutations. The selection of
the DE200 ephemeris also
causes different precession
and Greenwich Mean Sidereal
Time(GMST) calculations.
AUG 1985
8507.0
GLOBAL SET
EPHEM (cont)
NOTE: GEODYN is unable to distinguish between the DE118 and DE200
ephemerides without this option card, but it is able to distinguish
between the DE96 and the later DE118 and DE200 ephemerides. Thus
this card is REQUIRED only when the DE118 ephemeris is selected. For
the DE96 and DE200 ephemeris the program will determine which
ephemeris is actually supplied on unit #1
IF CARD OMITTED: DE200 ephemeris is assumed input on UNIT 1. If a DE96
ephemeris is input on UNIT 1 and this option card is
not present, GEODYN will reject the DE96 ephemeris and
function properly.
JUNE 1989
8906.0
GLOBAL SET