Instrument Host Information |
|
IDENTIFIER | urn:nasa:pds:context:instrument_host:spacecraft.gp::1.1 |
NAME |
GALILEO PROBE |
TYPE |
Spacecraft |
DESCRIPTION |
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.) |
NAIF INSTRUMENT IDENTIFIER |
GP |
SERIAL NUMBER | |
REFERENCES |
Yeates, C.M., T.V. Johnson, L. Colin, F.P. Fanale, L. Frank, and D.M. Hunten,
Galileo: Exploration of Jupiter's System, NASA SP-479 (REPLACED BY
YEATESETAL1985), 1985. D'Amario, L.A., L.E. Bright, and A.A. Wolf, Space Science Reviews, Volume 60 Numbers 1-4, 1992, The Galileo Mission, Kluwer Academic Publishers, 1992. |