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- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 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" @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 id "1654703" @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 path_id 02c354fd-8e2d-4825-b786-aa4b0782d1d6 @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 path_id b2140059-b3ca-415c-b0a7-3e142783ffe8 @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 path_id bb175474-5e70-47be-8e1f-8dcd7563cc5b @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 path_label "Instruments" @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 path_label "Magnetic Field/Electric Field Instruments" @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 path_label "Solar/Space Observing Instruments" @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 prefLabel "PASSIVE IONOSPHERIC MONITOR" @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 reference "" @default.
- 52feba5f-c6cd-4d33-9eae-3660fecd5c02 tag "Instruments" @default.