First Results From the AFRL Mass Spectrometer on the TacSat2 Satellite

Details First Results From the AFRL Mass Spectrometer on the TacSat2 Satellite First Results From the AFRL Mass Spectrometer on the TacSat2 Satellite

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsa54a..07m&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SA54A-07

Computer Science

Performance

0350 Pressure, Density, And Temperature, 0355 Thermosphere: Composition And Chemistry, 0394 Instruments And Techniques, 7969 Satellite Drag (1241)

Scientific paper

We present composition and total mass density measurements from the Atmospheric Density Mass Spectrometer (ADMS). ADMS provides the first thermospheric in-situ composition data in over 25 years. The instrument was launched into a 40 degree inclination, near-circular 400 km altitude orbit as a secondary experiment on the TacSat 2 satellite. Measurements were obtained January-November 2007, during low solar flux conditions. We describe the instrument operation principles, in-flight performance and the generation of geophysical data. The sensor is a well- calibrated quadrupole mass spectrometer with a unique routine internal calibration capability. Total mass densities and atomic oxygen number densities are estimated to be accurate within 10%. An on-board constant rate argon-neon source accurately monitors long and short term instrument sensitivity variations. ADMS data vs latitude, local time, day of year and geomagnetic activity are compared to empirical models, to total mass densities derived from the Air Force High Accuracy Satellite Drag Model (HASDM) and to in-situ, near-coincident GUVI composition and CHAMP density data.

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