Orbiter payload Accelerometer and Star tracker Accelerometer STAR
Orbiter payload
Accelerometer and Star tracker • Accelerometer (STAR): – measurement of the non-gravitational accelerations (due to air drag, albedo and solar radiation) – Mass: 15 kg – Power: 15 W – CHAMP heritage • Star tracker (APS): – 3 x APS -> Total mass: 5 kg – Total power: 15 W
Thermal Imaging Spectrometer Visible and Infra. Red Thermal Imaging Spectrometer - VIRTIS - - Both spectral (0. 25 – 1 µm visible and 1 – 5 µm IR) and spatial resolution (1 mrad) in meet the scientific requirements Heritage : Venus Express, Rosetta Improvement of the field of view would better accommodate the requirements (planned future instruments : NOMAD – Exo. Mars Trace Gas Orbiter, 2016) Mass : 27 kg Power requirements : 36 W
Submillimeter Sounder • Measurement of: – a large number of chemical species, such as water, SO 2, H 2 SO 4 üAccuracy: < 1 ppb – wind speeds, temperature üResolution: 18 km/h, 1 -2 K • Flexibility: the instrument can be adapted at the required measurement range • TRL = 6 (possible improvement on the wind speed resolution) • Mass = 7 kg • Max Operating Power = 21 W
Ground Penetrating Radar Shallow Radar - SHARAD - Spatial resolution (0. 3 -3 km x 3 -7 km horizontal and 7. 5 -15 m vertical) as well as subsurface penetration range (100 m) meet the scientific requirements - Heritage : Mars Reconnaissance Orbiter - Expecting development : Radar Sounder for En. Vision (Bruzzone, et al. ). - Mass : 17. 1 kg (11. 6 kg Electronics + 5. 5 kg antenna and cabling) Power : 28 W – Operating 17 W – Stand-By
Balloon payload
NMS • Measurement in situ of: – all the noble gases, simple molecular species, isotope ratios and more complex species such as S 8 (molecular weight 256 Da) • Huygens heritage, adapted for Venus chemical composition • Improved accurancy compared to Pioneer Venus and Venera 13 -14 missions • TRL = 6 • Mass = 9. 25 kg • Average Operating Power = 27. 70 W • Average Data Rate = 1. 50 kilobits/s
Atmospheric Science Pressure sensor developed for SAGE mission (2018) - Precision (0. 1 mb – up to 100 mb and 25 mb up to 92 bars) and range (0. 01 - 1 bar, 0. 1 -10 bar and 1 -100 bar) both meet the scientific requirements - Heritage : MVACS (Mars Volatiles and Climate Surveyor ; Mars Polar Lander - 1999 ) /HASI (Huygens Atmospheric Structure Instrument - 1994) - No new technology development necessary, but modifications needed for high temperature operation Temperature sensor developed for SAGE mission (2018) - Precision (1 K) and range (150 -750 K) both meet the scientific requirements Pressure sensor developed for SAGE mission (2018) - Precision (0. 18 km/h) meets the scientific requirements Power : 3. 2 W Mass : 2 kg
Balloon payload Small camera: • Pictures of/inside clouds • Package mass: < 100 g (assumed) • Must tolerate at least 60 C
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