NSSDC has brought the AE-8 and AP-8 models of the magnetospherically trapped energetic electrons and protons to World Wide Web accessibility and executability. These models, constructed at NSSDC some years ago, are still the world's standard models for spacecraft engineering purposes.
The AE-8 and AP-8 models have been accessible and executable via the NSSDC's captive On-Line Data and Information System (NODIS) account for several years. Now using the WWW browser, users may specify ranges in spatial parameters B/B0 (B is a magnetic field strength normalized to the field minimum B0 at the magnetic equator), McIlwain's L-shell value, and energy as well as may use the models for different phases (max or min) of the solar activity cycle. The series of the modeled flux values (omnidirectional integral or differential) corresponding to the specified conditions will be returned to the user.
This migration of the AE-8 and AP-8 trapped radiation models completes the move of the NSSDC's major network-accessible ionospheric, atmospheric, and geomagnetic/magnetospheric field models from NODIS to the Web. These models can be reached from URL http://nssdc.gsfc.nasa.gov/space/models/models_home.html. The Space Science Data Operations Office/NSSDC staff looks forward to the opportunity to participate in the current update of the AE-8 and AP-8 models that will be based on more recent data and techniques.