| prefLabel |
- Passive Ionospheric Monitor
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| definition |
- [Source: National Space Science Data Center, http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1977-044A-04 ]
The instrument consisted of a high-frequency radio receiver connected to a short antenna that swept from 1.3 to 13.9 MHz in 100-kHz steps. The device was used to monitor the ionospheric breakthrough frequency of noise generated by manmade or natural sources below the f2 layer to obtain the critical frequency of this layer (fof2). The fof2 parameter was used in constructing electron-density profiles used in forecasting the state of the ionosphere. The instrument could detect electric fields down to 10 microvolts/m.
Group: Instrument_Details
Entry_ID: PASSIVE IONOSPHERIC MONITOR
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Magnetic Field/Electric Field Instruments
Short_Name: PASSIVE IONOSPHERIC MONITOR
Long_Name: Passive Ionospheric Monitor (SSI/P)
End_Group
Group: Associated_Platforms
Short_Name: DMSP 5D-1/F4
Short_Name: DMSP 5D-1/F2
End_Group
Online_Resource: http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1977-044A-04
Creation_Date: 2008-09-25
Group: Instrument_Logistics
Instrument_Owner: United States Air Force
End_Group
End_Group
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| altLabel |
- Passive Ionospheric Monitor (SSI/P)
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| inScheme |
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| broader |
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