I am pleased to announce the release of PREDICT Version 2.3.0. PREDICT is a widely-used open source satellite tracking / orbital prediction application for Linux and Unix computing environments including PCs, laptops, Raspberry PIs, and Android devices running under a Termux environment. A new limited capability version that operates under a 32-bit DOS environment has been released as well.

PREDICT version 2.3.0 introduces an easy-to-use satellite transponder database editor and support for a mouse (or touch screen under a Termux/Android environment). New features make it possible to run PREDICT in Multi-Satellite Tracking Mode, left click on any satellite displayed on the screen, and be brought directly into Single Satellite Tracking Mode for more detailed tracking information on the chosen satellite. In addition, previously separate "Vocalizer" code has been integrated into PREDICT's mainline source. Text-to-speech operations are now executed in separate threads rather than forked background processes as was the practice in the past.

PREDICT was originally released under an Open Source Software General Public License in late 1999, and is cataloged under the Smithsonian/NASA Astrophysics Data System hosted by Harvard University. PREDICT has been successfully employed by the National Aeronautics and Space Administration where it provides orbital prediction and tracking data for VLBI radio telescope steering. PREDICT is employed by the European Space Agency's Rutherford Appleton Laboratory where it provides tracking and velocity profile data used to steer the 25 meter dish antenna at the Chilbolton Observatory (https://www.esa.int/ESA_Multimedia/Images/2006/03/Chilbolton_Observatory). PREDICT also powers AMSAT North America's on-line satellite prediction service (https://www.amsat.org/track/), and has served as the basis for a host of other derivative open-source software applications.

Additional information, including screenshots and download links, are available via the PREDICT website at:

https://www.qsl.net/kd2bd/predict.html

Happy Tracking!

73 de John, KD2BD