STOolS is a collection of useful space-related utilities and libraries (orbital mechanics, time management, etc) plus an integrated graphical environment.
The STOOLS time library. This library implement a st_date_t abstract data type, with support for UTC<->AIT conversion. It has support for MJD 2000 and GPS time.
The STOOLS sp3 library. This library implement readers and writers for the Standard Product #3 format.
This stool is a Standard Product #3 editor and manipulation program. It supports the loading of SP3 files, edition of the header and the tracks described on the file, graphical visualization of the data, and more facilities.
Goto the stools development project on Savannah.