The OrbitTools Libraries
NORAD SGP4/SDP4 Implementations in C++ and C#
Michael F. Henry

AOS Pro Utility Program

AOS Pro ("Acquisition Of Signal" Pro) is a command line utility program that calculates satellite pass prediction information for any earth location.  Written in C++, it is built using the Professional Edition of the OrbitTools Libraries and uses the Track Library for all pass prediction calculations.  Download and use AOS Pro to get an idea of the outstanding performance of the Track Library's proprietary pass prediction engine.

System Requirements

The AOS Pro utility is a 64-bit Microsoft Windows command line program.  You must be running a 64-bit version of Microsoft Windows in order to use AOS Pro.

Example Usage

The AOS Pro usage text and examples can be found on the AOS Pro examples page.



AOS Pro may be used free of charge for non-commercial use only; commercial users please contact the author.

AOS Pro Utility
aospro.exe - Version 1.4 April 23, 2017 (617 KB).  This is a 64-bit Microsoft Windows command line program.  After downloading, open a command prompt and type "aospro -h" for usage information.

TLE Data
In order to operate, AOS Pro requires TLE orbital data, which is published daily by NORAD.  There are numerous websites available for downloading TLE data, as a quick Google search will show.  However, one most convenient is's Current Data page.

  Copyright  2009-2017 Michael F. Henry.
The author may be reached at