[amsat-bb] InstantTrack & WiSP32 fix! For 2000 epoc keps

[Randolph Kohlwey <kohlwey@xxxxxxxxxxxx>]

Fix for WiSP32 and InstantTrack 2000 epoch keps


The InstantTrack fix for 2000 epoch keps also
works with WiSP32.  If you run both programs
like I do just update WiSP with the AMSAT keps
created from the 2 line keps by the 2L2ITKE.EXE
program.

======= How to ===============================

To run 2L2IKE program by G3RUL/F6HCC:

	2L2IKE 2ln.txt

Replace 2ln.txt with the file name of your
2 line kep file.  The program will then
create a "AMSAT.ITK" file.

Under Wisp
Select  DataBase\Update Keplerian Database

and then for the "Files of type:" select
"AMSAT Keplerian elements" instead of the
"NASA Keplerian elements" default.

Then select the 2L2ITKE output file AMSAT.ITK for
the file name.

=================

For InstantTrack just select:

5. Update Satellite Elements
3. UPDATE:
1. AMSAT format file.

and then enter the path and file name for your
AMSAT.ITK file.

======= How does it work =====================

The program takes a 2000 epoc 2 line element
and creates a AMSAT element set.

WEBER2
1 99997U 00001E   00015.13819000  .00000001  00000-0  00000-0 0    28
2 99997 100.0000 212.3691 0000001   0.0000 180.0000 14.42576000    09

is changed to:

Satellite: WEBER2
Catalog number: 99997
Epoch time:      100015.13819000
Element set:     2 
Inclination:      100.0000 deg
RA of node:       212.3691 deg
Eccentricity:    0.0000001
Arg of perigee:     0.0000 deg
Mean anomaly:     180.0000 deg
Mean motion:   14.42576000 rev/day
Decay rate:    9.9999E-009 rev/day^2
Epoch rev:               0
Checksum:              205

===========================

The fix is in the Epoch time line. In the distributed AMSAT set the
Epoc Time line would be:

Epoch time:       00015.13819000

By adding 100 to the year the 2L2ITKE.EXE program changes the line to

Epoch time:      100015.13819000


This fix works for both InstantTrack and WiSP32. I do not know if it will
work for the other programs.  If it does maybe AMSAT could distribute its
AMSAT keps in this format!


======= Where to get ============

A copy of the 2L2ITKE program can be found at:

http://www.amsatnet.com/

Look 1/2 down the full page for the following link:

Instant Track Y2K fix for AMSAT 2-Line Kep file by Jean,
F6HCC Download CVITK_EN 26K Zip

==========

I do not know if it is still on any of the digital satellites.


================================================


73, Randy N7SFI

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