Lander Experiment ROMAP Experiment Overview ROMAP Magnetometer Electrostatic Analyser Pressure Sensors Commissioning Results Functionality, Anomalies Spacecraft / Lander Disturbances Common Measurement Sept. 08/09 RPC Mag - ROMAP Why & when common measurements

Magnetometer ROMAP & RPC fluxgate sensors: ROMAP Mag electronics: Both are vector compensated ringcore sensors RPC: Coils on ceramics, feedback and sense using the same coil system ROMAP: Cu wire covered by bond coat, feedback separated from sense coils ROMAP sensor two times larger in diameter ROMAP Mag electronics: Digital fluxgate electronics (sensor ac signal digitised by 40kHz, pre-processing in FPGA) ROMAP Mag parameters: Range 2000nT Resolution 0.005nT

Plasma Monitor Electrostatic Analyser Faraday Cup energy range ions 40...8000eV electrons 0.3...4200eV energy steps 32 / 64 exp. time 40ms...1s Faraday Cup integral energy distribution up to 2000eV energy steps 64 range 5x10-12 – 4x10-10 A

Sensor Accommodation 1kg inclusive boom 0.8…1.0Watt depending on mode

SI: Fluxgate Magnetometer (FGM) Karl Heinz Glassmeier, TU-BS in co-operation with IWF-Graz PI of the ROSETTA Magnetometer Co-I of the GIOTTO Mission and on the magnetometer teams for CLUSTER, FREJA and CASSINI missions Research interest and experience in data analysis and theory of space plasma physics and solar system physics in general About 150 publications in space science Equator-S, Double Star, DS1, Rosetta Orbiter Rosetta Lander, Venus Express THEMIS/SITE VISIT SI-15 UCB, 01/28/2003

SI: Fluxgate Magnetometer (FGM) Fluxgate Sensor Ringcore Technology Developed since 1983 by several German institutes and companies Noise < 10pT/Sqrt(Hz) Offset stability < 2nT/year Vector compensating Helmholtz System No transverse field dependency Orientation of magnetic axis depends on feedback coil system only No support material like ceramics: low weight & temp. dependence of scale value depends on one material Mass < 50gr Volume 5x5x4cm3 THEMIS/SITE VISIT SI-16 UCB, 01/28/2003

SI: Fluxgate Magnetometer (FGM) Digital Fluxgate Electronics Heritage / Reliability Developed in Germany since 1991 Tested worldwide in observatories (high precision) and applied physics (robustness) First space application onboard the MIR, actually prepared for ESA’s Rosetta and Venus Express missions Advantages Digitization close to sensor very limited number of analogue components Very large dynamic range 10pT resolution also close to Earth no range switching anymore DAC IDPU Sensor ADC FPGA feedback sense excitation THEMIS/SITE VISIT SI-17 UCB, 01/28/2003

SI: Fluxgate Magnetometer (FGM) Test & Calibration Preflight All magnetometers will be tested under various environmental conditions (B,) Large number of facilities exist in Europe (Magnetsrode, Niemegk, Graz…) Additionally a test facility (similar to that in Graz) will be installed in Berkeley Inflight preprocessing and calibration software for Cluster and Equator-S was developed in Braunschweig and Graz Personal (E.Georgescu, K.H.Fornacon) is available after Cluster Cluster, Equator-S Rosetta O. & L. Oerstedt, Champ Cassini, Giotto Ampte, Helios Freja, DS1 ... THEMIS/SITE VISIT SI-18 UCB, 01/28/2003