CRRES Proton Telescope 1-Min Equatorial Pitch Angle Distributions, UNIX Binary

Description

This data set from the Proton Telescope (PROTEL) instrument on the CRRES satellite includes equatorial pitch angle distributions of one-minute flux averages for twenty-four proton energy channels at 1 to 100 MeV. Input for creating this database was raw PROTEL data at 1.024-sec time resolution. In one-minute intervals these high resolution data were sorted and averaged into five-degree local pitch angle bins (19 bins ranging from 0 to 90 degrees). For every one-minute interval (with average UT and local spatial coordinates), the 19 pitch angles were assigned a McIlwain L value computed from a combined IGRF-1985 and Olson-Pfitzer quiet static magnetic field model. The local pitch angle distribution was then mapped to the magnetic equator in 0.05-wide McIlwain L bins, assuming the conservation of the first adiabatic invariant. Finally, a loss cone subtraction was performed on the resultant equatorial pitch angle distribution. This equatorial mapping procedure was applied to both the first and second half of each CRRES orbit. The data files (d08XXXX.pad) for CRRES orbit number XXXX = 15 - 1067 are provided in UNIX binary format along with FORTRAN software for extraction of selected parameters and a format description in Microsoft Word (*.doc) and Portable Document Format (*.pdf) files.

This data set is available on-line either via anonymous FTP login at nssdcftp.gsfc.nasa.gov in directory spacecraft_data/crres/particle_protel or via the web at the following URL:

ftp://nssdcftp.gsfc.nasa.gov/spacecraft_data/crres/particle_protel/