Astrodynamics Software

Fundamentals of Astrodynamics and Applications
Third Edition

by
David Vallado

Last updated 2009 May 6

• Purchase the Text

• Astrobooks.com

• Errata

• Errata listing for First Edition (as of 2000 Apr 19)

• Errata listing for Second Edition (as of 2004 Aug 01)

• Errata listing for Second Edition, Second Printing (as of 2006 February 18)

• Errata listing for Third Edition (as of 2009 May 5)

• Software and Data

• Computer software in FORTRAN

• Computer software in C++

• Computer software in Pascal

• Computer software in MATLAB

• Organization of the Material

The code is available in 4 languages, and it is organized roughly according to function. Thus, all the time routines are in one file, the perturbation techniques in another, and so forth.

AST2BODY	Two-body relations
COMPLX	Complex math
CONSTS	Constants WGS-84, JGM-2, etc.
ASTDC	Differential correction
ASTINTER	Interplanetary
ASTIOD	Initial orbit determination
ASTMANV	Maneuvers
ASTMATH	Math
ASTPERT	Perturbation
ASTREDUC	Reduction of coordinates
ASTTIME	Time
ASTUTIL	Character operations
SGP4UNIT	SGP4 routines

Several data files are needed for some of the files.

NUT85.DAT	Nutation coefficients for planetary 85
NUTATION.DAT	Nutation coefficients for 106
ATMOSEXP.DAT	Sample exponential atmosphere values
TESTASTF.DAT	Input for sample test program
SENSOR.DAT	Sensor sample values
GEOS1.IN	DC input test 1
GEOS2.IN	DC input test 2
GEOS5.IN	DC input test 5
GEOS1.TXT	DC sample output results 1
GEOS2.TXT	DC sample output results 2
GEOS5.TXT	DC sample output results 5
SGP4-VER.TLE	Sample SGP4 test cases

• Cross-Reference of Available Functions [Excel spreadsheet]

Within each file there are specific routines to accomplish various operations. Effort has been taken to use similar names and function scopes, although there are some differences based on language features. The SOFTWARE worksheet discusses the specific routines that are available within each larger technical area.

The ALGORITHMS worksheet lists which routines are available (MATLAB).

The EXAMPLES worksheet lists what MATLAB scripts will perform the example exercises in the text. Many are complete, but a few remain to finish all the examples in the text.

The test program is a simple program that executes the input/output operations of each subroutine in that package. There isn't anything fancy about it. It's just intended to be a quick check of the answers. The TESTASTF.DAT file contains my results using the codes. Additional work is needed to update this file, but it’s a start.

Questions and comments:
Work e-mail: dvallado@centerforspace.com
Work telephone: 877-292-CSSI

	TLE Data	Space Data
	Current Archives Documentation	GPS EOP Space Weather
	SATCAT	Columns
	Boxscore	Software
	SOCRATES

Dr. T.S. Kelso [TS.Kelso@celestrak.com] Follow CelesTrak on Twitter @TSKelso Last updated: 2009 May 6 16:25:54 UTC Accessed 49,732 times since 2000 December 16 Current system time: 2010 March 17 22:09:26 UTC