Volume 14, Number 3, September 1998
By Joseph King
The 1973-launched Interplanetary Monitoring Platform (IMP ) 8 spacecraft carries several energetic particle investigations covering complementary energy and species domains. This note is to inform readers of several recent milestones reached at NSSDC in making the uniquely long data sets from these investigations network-accessible.
Robert Decker of the Applied Physics Laboratory (APL) has provided to NSSDC more than 100 CD-ROMs containing 20-sec resolution count rate data from the Johns Hopkins University (JHU)/APL Charged Particle Measurements Experiment (CPME-principle investigator (PI): Decker; original PI: Krimigis) and Energetic Particles Experiment (EPE-PI: Williams; key person: Michell) experiments, supplemented by magnetometer (Lepping) and solar wind plasma (Lazarus) data. NSSDC has now loaded all available data (1973-1997) as Space Physics Catalog ( SPyCAT) access.
NSSDC has also very recently ingested to NDADS 11-min resolution count rate data (charge state vs. energy) in ASCII from the University of Maryland charge state measurement investigation (PI: Ipavich; original PI: Gloeckler) for the 1991-1997 period. NSSDC will add the 1973-1991 Maryland data to NDADS shortly. Creation of this data set is further discussed elsewhere in this newsletter.
Another key IMP 8 particle data set extended through 1997 since the original announcement of NSSDC availability is 15-min count rate data from University of Chicago (PI: Lopate; original PI: Simpson). Owing to its smaller data volume, this ASCII data set is held on magnetic disk for anonymous/FTP access rather than for access through NDADS/SPyCAT.
An overview of all available IMP 8 data, both electronically accessible and otherwise and from both IMP PIs and from NSSDC, is found on the IMP 8 WWW page . Access to all NSSDC's IMP 8 data, both through its various electronic interfaces and through its request office, is provided through the WWW page indexing all NSSDC's electronically accessible space physics data. Further information about the above-discussed experiments and data sets, including that needed to determine particle fluxes, are found from the SPyCAT page and from the IMP area of the NSSDC Master Catalog.