IMP-8 MAG KP Data Caveat

Key Parameters for the Magnetometer investigation are computed within the ISTP/CDHF for a week of data at a time. Generally Key Parameter availability lags real time by about 14 days.

IMP-8 PLA KP Data Caveat

Parameters derived on a routine basis are proton velocity, number density, and temperature (most probable thermal speed). Those parameters are obtained from a non-linear, least-squares fit to the observed fluxes using a convected, isotropic Maxwellian model.

Key Parameters for the Plasma instrument are computed at MIT using Level Zero data that are staged to the ISTP/CDHF approximately two weeks after being received on Earth. Thus the plasma instrument's Key Parameters lag real time by something greater than 2 weeks, but less than four.