Humidity Transmitter for Martian Environment, Construction and Performance Assessment

Details Humidity Transmitter for Martian Environment, Construction and Performance Assessment Humidity Transmitter for Martian Environment, Construction and Performance Assessment

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p12a0367l&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #P12A-0367

Computer Science

Sound

0394 Instruments And Techniques, 3394 Instruments And Techniques

Scientific paper

Humicap is a miniatyre capasitic thin film polymer sensor for sensing relative humidity build in quantities for atmospheric sounding balloon applications by Vaisala inc. These sensors have been selected for the Atmospherical and Meteorological Instrument System (ATMIS) onboard NetLander mission to Mars. The four landers are to be deployed to areas in both Martian hemispheres in tropics to low mid-latitudes, launch 2007 and operations on Mars through 2008...2010. Digihum is a complete Humicap sensor head including electrical transducer circuitry and quasi-digital interface making connection to digital microcontroller simple and easy. The Digihum will be exposed to raw martian environment with temperature range from min ~150 K to max ~290 K. Digihum is expected to produce humidity measurements down to 200 K temperatures. Qualification and calibration of the Digihum devices will be performed both in ambient atmosperic pressure humidity chambers as well as low pressure CO2 environments. In situ humidity measurements provided by Digihum will be part of ATMIS measurement campaign through a full Martian year. The main operational objective of this meteorological experiment is to provide a regular time series of the meteorological parameters as well as accelerated measurement campaigns. Such a data set would substantially improve our understanding of the atmospheric structure, dynamics, climatological cycles, atmosphere-surface interactions, the cycles of CO2 and H20 and the role of water in current Martian atmosphere.

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