----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
PLANET 300 20 20 3.986004359D+14 6378144.11 298.255
----+----0----+----0----+----0----+----0----+----0----+----0----+----0----+----0
COLUMNS FORMAT DESCRIPTION DEFAULT VALUE & UNITS
1-6 A6 PLANET - Modifies the 3rd body
gravitational potential and/or
introduces new constants.
7 I1 Gravity model initalization indicator. 0
= 0 Gravitational coefficients are
initialized from gravity model file.
They may be changed by GCOEF, GCOEFC
or GCOEFS cards.
> 0 Gravitational coefficients are set
to zero except those which appear on
GCOEF, GCOEFC, or GCOEFS cards which
follow this card.
8 I1 Gravity model print control switch. 0
= 0 Print two portions of model:
1. lowest degree & order; and
2. highest degree & order.
= 1 Print entire gravity model. :
: N/A
= 2 Print only model checksum. :
9 I1 Indicator of the contents of the 0
remainder of this card:
= 0 Columns 25-80 contain the
values for GMb, Ab, 1/fp, 1/fe.
= 1 Columns 25-80 contain the (see NOTE[3])
sigmas for GMb, Ab, 1/fp, 1/fe.
JUL 1998
9808.0
GLOBAL SET
PLANET (cont)
COLUMNS FORMAT DESCRIPTION DEFAULT VALUE & UNITS
10 I1 > 0 Indicates that this body should be
excluded from force model calculations
11-14 I4 Indicates body for which gravity no default
perturbation is to be modified.
Body numbers are as follows:
0100 Mercury
0200 Venus
0300 Earth
0301 Earth's Moon
0400 Mars
0500 Jupiter
0600 Saturn
0700 Uranus
0800 Neptune
0900 Pluto
9999 Sun
15-17 I3 Maximum degree of coefficient to be 3
used in the gravitational model.
Minimum =3. Default depends on gravity
model file on unit 12.(See NOTE[1] and
NOTE[2]).
18-20 I3 Maximum order of coefficient to be 2
used in the gravitational model.
Minimum =2. Default depends on
gravity model file on unit 12.
(See NOTE[2]).
The presence of degree and order in the
two integer fields above automatically
defines this planet as the center of
integration
JUL 1998
9808.0
GLOBAL SET
PLANET (cont)
COLUMNS FORMAT DESCRIPTION DEFAULT VALUE & UNITS
21-22 I2 Precession model indicator for
Mars orbiters.
=0 The old precession model is used old model
=1 The new precession nutation model
is used
23 I1 Index to Venus constant option 1989 Planetary
=0 1989 planetary constants constants.
=1 1991 planetary constants
24 I1 Index to lunar orientation parameter COSPAR report
option
=0 values from the report /IAU/IAG/COSPAR
=1 values drom the 403 Planetary Ephemeris
25-44 D20.8 Universal gravitational constant See table below for
times the mass of the Body (GMb), third body perturb.
or sigma value if column 9 =1, (M**3/S**2)
45-59 D15.3 Semi-major axis of the Body (Ab), See table below for
or sigma value if column 9 =1, third body perturb.
(M)
60-72 D13.1 Inverse of the Body's polar See table below for
flattening (1/fp), third body perturb.
or sigma value if column 9 =1,
73-80 D8.3 Inverse of the Body's equatorial flattening 0.
(1/fe) or sigma value if column 9 =1.
JUL 1998
9808.0
GLOBAL SET
PLANET (cont)
TABLE OF DEFAULT BODY CONSTANTS
Body GMb Ab fp fe
------------- --------------- --------------- --------------- ---------------
Mercury 2.203208000D+14
Venus 3.248602000D+14 6.168810000D+06 0.0 0.0
Earth's Moon 4.902778000D+12 1.738090000D+06 0.378000000D-03 0.0
Mars 4.282845000D+13 3.380422000D+06 0.105000000D-01 0.0
Jupiter 1.267077000D+17 7.137155400D+07 0.667000000D-01 0.0
Saturn 3.792653500D+16 6.041128000D+07 0.105000000D 00 0.0
Uranus 5.780158500D+15
Neptune 6.871307800D+15
Pluto
Sun 1.327125000D+20 6.960000000D+08 0.500000000D-04 0.0
NOTE[1]:
The default values for degree and order of the gravity field and
the Body constants are overridden by the values from the gravity
model file on unit 12.
EARTH and PLANET are actually the same keyword card except that
EARTH automatically supplies the planet number (0300).
NOTE[2]:
All interplanetary runs need PLANET cards for Saturn and Jupiter
for the relativity modelling.
NOTE[3]:
Only one set of (GMb,Ab,1/fp,1/fe) parameters can be adjusted.
This set of parameters must be for the central body.
UNITS: M =Meters ; S =Seconds
IF CARD OMITTED:
The complete gravitational field contained in the default gravity
model file on unit 12 will be used for the central body and the sun
and moon will be used as third body perturbers. If the central body
is other than Earth, then Earth will replace that body as a third
body pertubation.
APR 1997
9704.0
GLOBAL SET