I have written GEOLong.exe, a freeware MS-DOS program which computes the 24
hour mean longitude and the drift rate/direction of GEOsats on a specific date.
It finds all of the GEOsats in a NORAD 2-line elements source file specified by
the user.
GEOsats are filtered on the basis of maximum inclination, maximum eccentricity
and maximum rate of drift. Users are prompted with default values, which they
may change.
The output is sorted on the basis of longitude, beginning with the most
easterly and proceeding westward. Orbital inclination, perigee height, apogee
height and the age of the elements are included for each object.
Here is a sample of the first few lines of output:
Location of Geosats on 2001 May 27 UTC
NORAD Desig Name Inc PER APO Long
Drift Age
deg km km deg
deg/d days
-------------------------------------------------------------------------------
-------------
20918 1990-093A Inmarsat II F-1 1.8 35773 35801 179.0 E
0.00 E 1
24674 1996-070A Inmarsat III F3 0.1 35770 35804 178.0 E
0.00 E -0
23124 1994-034A Intelsat 702 0.0 35777 35796 176.1 E
0.00 E 2
15825 1985-048C Arabsat 1B 7.0 35706 35804 175.7 E
0.41 E 2
14134 1983-059C Palapa B1 8.0 35768 35840 175.1 E
0.22 W 2
24846 1997-031A Intelsat 802 0.0 35773 35801 174.1 E
0.00 E 2
The program is less than 100k is size; I will be pleased to e-mail a copy to
anyone upon request.
Ted Molczan
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This archive was generated by hypermail 2b29 : Thu May 31 2001 - 13:48:29 PDT