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Instrument: SSI/ES2 : Special Sensor Ionospheric Plasma Monitor 2
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Associated Platforms
DMSP 5D-2/F12
DMSP 5D-2/F13
DMSP 5D-2/F14

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

The SSI/ES is an improved version of the Special Sensor for Ions and Electrons (SSI/E). The SSI/E instruments measure the ambient electron density and temperatures, the ambient ion density, and the average ion temperature and molecular weight at the DMSP orbital altitude.

This instrument consists of an electron sensor (Langmuir probe) and an ion sensor mounted on a 2.5 meter boom. The ion sensor is a planar aperature, planar collector sensor oriented to face the spacecraft velocity vector at all times. In addition to the Langmuir probe and planar collector which make up the SSI/E, the SSI/ES has a plasma drift meter and a scintillation meter. An upgraded version of the SSI/ES (SSI/ES-2) is planned for flight on vehicles through S-20.

URL for data archive:

NGDC has received DMSP SSI/E data from satellites F-4 through F-7 and SSI/ES data from satellites F-8 through F-13.

Online Resources

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