San Marco D/L EFI AC/DC Data

Description

This San Marco D/L Electric Field Experiment (EFI) data set was provided by the PI team in ASCII format and constitutes the final EFI archiving product. The following parameters have been archived: (A) DC electric field (8 points per second) along the X and Y axes in spacecraft coordinates; (B) Variational (AC) electric fields averaged at 0.5 second intervals for all channels of each of the three spectrometers; (C) Some orbital parameters such as the altitude of the satellite, the geographic longitude and latitude, the local solar time and the dip latitude, and a day/night flag for the DC data; (D) Non-reduced plasma ion densities measured by the Ion Velocity Instrument (IVI). The DC portion of the EFI experiment is only valid for non-reduced IVI data > 2.5 volts corresponding roughly to an electron density of 10^4 electrons per cubic centimeter. Note that the AC data is valid at all plasma densities. More details can be found in the SFDU Voldesc and Format files on the tapes. The content from the first tape is available online in NSSDC's anonymous ftp archive at

ftp://nssdcftp.gsfc.nasa.gov/spacecraft_data/san_marco/electric_fields_efi/