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Instrument: SSI/ES : Special Sensor Ionospheric Plasma Monitor
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Associated Platforms
DMSP 5D-3/F15
DMSP 5D-2/F11
DMSP 5D-2/F10
DMSP 5D-2/F9
DMSP 5D-2/F8

Spectral/Frequency Information
Spectral/Frequency Coverage/Range: 20 Hz to 12 kHz

Related Data Sets
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[Source: National Space Science Data Center, ]

The primary purpose of the ionospheric/scintillation monitor, SSI/ES, is to measure electron density and temperature, hydrogen and oxygen ion density and temperature, the power spectrum of plasma irregularities, and the velocity components of bulk plasma flow at satellite altitude. The experiment consists of four sensors. The electrostatic analyzer measures electron parameters at least 1 m above the satellite surface. The ion retarding potential analyzer has a body-mounted electrostatic trap with a circular aperture to measure ion density and temperature. The driftmeter uses a planar electrostatic ion trap with a four-quadrant collector. The current is measured in pairs of quadrants and differenced to provide plasma drift velocities. The scintillation monitor obtains power spectrum irregularities by an ion trap with electrometer and amplifiers capable of measuring direct and alternating current in the frequency range from 20 Hz to 12 kHz.

Online Resources

Instrument Logistics
Instrument Owner: Department of Defense-Department of the Air Force (United States)