Spacetrack Report #6

ROB MATSON (ROBERT.D.MATSON@cpmx.saic.com)
28 Mar 1997 09:57:12 -0800

Hi Curtis,

The title of the report is:  "PROJECT SPACE TRACK, Spacetrack Report No. 6,
Models For Propagation of Space Command Element Sets", dated JULY 1986, Space
Command, United States Air Force.  Requests for additional copies by non-DoD
agencies or contractors should be directed to:

Department of Commerce
National Technical Information Service
5285 Port Royal Rd.
Springfield, VA 22161

It also gives the following address for special inquiries:

Project SPACETRACK Reports
Directorate of Astrodynamics
HQ Air Force Space Command
HQ AFSPACECOM/DOA
Peterson AFB, CO 80914-5001
Stop:  7

The abstract is as follows:

SPACETRACK REPORT NO. 6

MODELS FOR PROPAGATION OF SPACE COMMAND ELEMENT SETS

FELIX R. HOOTS

HQ AIR FORCE SPACE COMMAND - COLORADO SPRINGS, COLORADO

_ABSTRACT_

General perturbations element sets produced by Space Command can be used to
predict position and velocity of Earth-orbiting objects.  To do so, one must
be careful to use a prediction method which is compatible with the way in
which the element sets were generated.  Equations and FORTRAN computer code
are given for implementation and prediction with the improved and more
accurate Space Command model called HANDE. With this method users should be
able to make satellite predictions which are completely compatible with Space
Command predictions.   Additionally, equations and code are provided for an
older Space Command model, SGP.  Although somewhat less accurate, predictions
made with elements extracted from the HANDE element set will be quite
compatible with those of Space Command.

- - - - -

Space Command never switched over to the HANDE 3-line format, but the HANDE
model can be used with two-line element sets.  (The HANDE model is included
with SkyMap).  I have not activated the deep-space routines for HANDE, but
plan to, following my clean-up of the deep routines called by SDP4. --Rob