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The open‐source neutral‐mass spectrometer on Atmosphere Explorer‐C, ‐D, and ‐E
The open-source mass spectrometer will be used to obtain the number densities of the neutral atmospheric gases in the mass range 1 to 48 amu at the satellite location. The ion source has beenExpand
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A global thermospheric model based on mass spectrometer and incoherent scatter data MSIS, 2. Composition
Measurements of O, He, and Ar from neutral gas mass spectrometers on four satellites (Ogo 6, San Marco 3, Aeros A, and AE-C) and inferred O2 and H densities from an ion mass spectrometer on AE-C haveExpand
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Direct measurements of neutral wave characteristics in the thermosphere
Waves in the neutral upper atmosphere have been measured by the open source neutral mass spectrometer (Oss) during both the elliptical and the circular phases of the Atmosphere Explorer-C mission.Expand
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Seasonal variation of neutral thermospheric constituents in the Northern Hemisphere
The Atmosphere Explorer-C satellite carries a large number of experiments including an open source neutral mass spectrometer. Among the measurements obtained with this instrument were ones ofExpand
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Winter bulge and diurnal variations in hydrogen inferred from AE-C composition measurements
The atomic hydrogen distribution at 250 km during December 1974 solstice has been inferred, considering charge exchange equilibrium, from Atmosphere Explorer-C measurements of n(H+), n(O+), and n(O).Expand
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Spiral Electron Multiplier Operation Characteristics Using Positive Ions
Operational characteristics of a spiral electron multiplier are discussed, and measurements of gains and detection efficiencies using positive ions are presented. These parameters were observedExpand
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The measurement of chemically reactive atmospheric constituents by mass spectrometers carried on high‐speed spacecraft
The quasi-open-source mass spectrometer carried on the Atmosphere Explorer-C satellite has a mode of operation which utilizes the velocity of the vehicle (∼ 8.5 km/sec near perigee) to distinguishExpand
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Phase and amplitude relationships of wave structure observed in the lower thermosphere
Data from the Atmosphere Explorer-C satellite clearly exhibit wavelike variations in neutral composition, ion density, and electron temperature, variations which appear to be a general feature of theExpand
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Atomic and molecular oxygen densities in the lower thermosphere
The Atmosphere Explorer-C satellite carries a neutral mass spectrometer having a quasi-open ion source which can be operated either in a normal mode or in one which utilizes the velocity of theExpand
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Extension of atomic nitrogen measurements into the lower thermosphere
Special operating modes of the open source neutral mass spectrometer (OSS) on the Atmosphere Explorer C permit the measurement of odd nitrogen (N + NO) number densities between 180 and 450 km. ByExpand
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