Dynamics Explorer-2 (DE 2) spacecraft This directory gathers data for the DE 2 spacecraft which was launched on 3 August 1981 into an elliptical orbit with an altitude range of 300 km to 1000 km and re-entered the atmosphere on 19 February 1983. Subdirectories: combined_plasma_neutrals_ua/ combined 15-s data from NACS, LANG, WATS, RPA, IDM, FPI electric_fields_vefi/ data from the vector electric field instrument (VEFI) magnetic_electric_fields_vefi_magb/ combined data from VEFI and MAGB magnetic_fields_magb/ data from the magnetometer (MAG-B) neutral_gas_nacs/ data from the neutral atmosphere composition spectrometer (NACS) neutral_gas_wats/ data from the wind and temperature spectrometer (WATS) particles_lapi/ data from the low altitude plasma instrument (LAPI) plasma_idm/ data from the ion drift meter (IDM) plasma_lang/ data from the Langmuir probe instrument (LANG) plasma_rpa/ data from the retarding potential analyzer (RPA) Additional related information: Some data and plots are also available through other SPDF data systems: 16-sec UA data and 0.5-sec magnetic and electric field data at Orbit data and plots at . Please acknowledge the NASA Space Physics Data Facility and the instrument's Principal Investigator for data usage. Keywords: Sun-Earth Connections, space physics, magnetosphere, ionosphere Data contact: Dieter.Bilitza-1@nasa.gov> NASA Official: Dr. Robert McGuire