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Table 4 Pressure sensor requirements

From: The Mars Environmental Dynamics Analyzer, MEDA. A Suite of Environmental Sensors for the Mars 2020 Mission

MEPAG Goals (2014) Investigation Requirements Performance
Goal II, Obj. A1, A4
Goal III, Obj. A3
Goal IV, Obj. B4, B7.
Detection of dust devil pressure signatures. The PS resolution shall be better than 0.5 Pa. NGM resolution in nominal mode (1 Hz measurement) ∼0.12 Pa. RSP2M resolution in nominal mode in order of 0.3-0.4 Pa.
The sensor shall be able to detect pressure changes with a variation speed of at least 1 Pa/s (PS’ response time shall be equal or better than [1 sec]). On sensor level <1 Pa/s. On rover level achieved by heritage in the design (similar to REMS onboard MSL).
Goal II, Obj. A1, A4
Goal III, Obj. A3
Goal IV, Obj. B1, B7.
Seasonal and diurnal pressure cycles The PS shall have a range of [1-1200 Pa] [Req. L4-MEDA-05]. Note: the calibration shall be optimized for Mars range 400-1200 Pa and also for high vacuum. The sensor has been calibrated in the range of [0–1400 Pa].
Goal II, Obj. A1. Pressure oscillations on the diurnal and hour scale The PS accuracy shall be equal or better than [+/-20 Pa] from [1 to 400 Pa] and [+/-10 Pa] from [400 to 1200 Pa], over the operational temperature range of [-45 C to +55 C] [Req. L4-MEDA-43]. With preliminary calibration coefficients, the accuracy of measurements performed during rover level tests is better than +/-5 Pa. Final calibration coefficients and accuracy BOL will be determined after the cruise calibration checkout.