PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM LABEL_REVISION_NOTE = "20070626, SLA/EN, added dummy, missing LAB_REV_NOTE." OBJECT = INSTRUMENT_HOST INSTRUMENT_HOST_ID = "GP" OBJECT = INSTRUMENT_HOST_INFORMATION INSTRUMENT_HOST_NAME = "GALILEO PROBE" INSTRUMENT_HOST_TYPE = "SPACECRAFT" INSTRUMENT_HOST_DESC = " Instrument Host Overview ======================== The Galileo spacecraft consists of two parts, an orbiter (SPACECRAFT_ID = 'GO') and a probe (SPACECRAFT_ID = 'GP'). Spacecraft power is provided by two radioisotope thermoelectric generators. Propulsion is accomplished via a bipropellant system of twelve 10- newton thrusters and one 400 newton engine. The command and data subsystem consists of multiple microprocesors and a high-speed data bus. The Galileo atmospheric probe will be deployed from the orbiter 150 days prior to Jupiter encounter. The probe consists of a deceleration module and a descent module. It weighs about 331 kilograms, half of which is the heat shield. After entering the Jovian atmosphere and slowing its descent, the descent module deploys a 2.5 meter parachute and begins transmitting data from its instruments at a rate of 128 bits per second. (Refer to Yeates, et al, 1985; Johnson, et al, 1992.) Platform Description -------------------- Platform PROBE DESCENT MODULE The atmospheric descent module contains seven scientific instruments: the atmospheric structure instrument (ASI), the neutral mass spectrometer (NMS), the helium abundance detector (HAD), the nephelometer (NEP), the net-flux radiometer (NFR), the lightning and radio emissions detector (LRD), and the energetic particles instrument (EPI). The instruments are contained in hermetically sealed housings designed to withstand a pressure of 20 bars. The instrument data are transmitted to the orbiter over two simultaneously operating channels in the L band. (Refer to Yeates, et al, 1985; Johnson, et al, 1992.)" END_OBJECT = INSTRUMENT_HOST_INFORMATION OBJECT = INSTRUMENT_HOST_REFERENCE_INFO REFERENCE_KEY_ID = "GLL1985" END_OBJECT = INSTRUMENT_HOST_REFERENCE_INFO OBJECT = INSTRUMENT_HOST_REFERENCE_INFO REFERENCE_KEY_ID = "SSR1992" END_OBJECT = INSTRUMENT_HOST_REFERENCE_INFO END_OBJECT = INSTRUMENT_HOST END