WMO OSCAR | Details for Instrument SPM

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Instrument: SPM

Instrument details

Acronym	SPM
Full name	Solar Proton Monitor
Purpose	Monitoring of solar protons hiting the platform
Short description	Three solid state detectors monitoring the omnidirectional fluxes of solar protons in the energy ranges 0.27-3.2 MeV, 3.2-60 Mev and > 60 MeV; and alpha-particles in the range 12.5-32 MeV; and electrons of energy > 140 keV
Background	New development
Scanning Technique	N/A (in-situ measurement in the platform environment)
Resolution	N/A
Coverage / Cycle	N/A
Mass		Power	Data Rate

Providing Agency	NOAA
Instrument Maturity	Flown on operational programme
Utilization Period:	1970 to 1979
Last update:	2017-06-04

Detailed characteristics

Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

NOAA 3rd generation / Improved TIROS Operational System (NOAA)
- ITOS-1 (TIROS-M) (see instrument status) Apr 1970 - Jun 1971
- NOAA-1 (see instrument status) Mar 1971 - Aug 1971
- NOAA-2 (see instrument status) Jan 1973 - Jan 1975
- NOAA-3 (see instrument status) Feb 1974 - Aug 1976
- NOAA-4 (see instrument status) Feb 1975 - Nov 1978
- NOAA-5 (see instrument status) Oct 1976 - Jul 1979

Instrument classification

Solar and space environment monitors
Energetic particle spectrometer

WIGOS Subcomponents

Subcomponent 1
In-situ plasma probes, and energetic particle spectrometers and magnetometers at GEO and LEO, and magnetic field at GEO
Proton sensor at LEO

Mission objectives

Primary mission objectives

Alpha particles integral directional flux
Electron integral directional flux
Proton integral directional flux

Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.

Variable	Relevance for measuring this variable	Operational limitations	Explanation
Electron integral directional flux*	5 - marginal	No specific limitation.	Platform environment, medium and high energy (over 40 to over 400 keV)
Proton integral directional flux*	5 - marginal	No specific limitation.	Platform environment, medium and high energy (over 40 to over 1000 keV)
Alpha particles integral directional flux*	5 - marginal	No specific limitation.	Platform environment. Low-medium energy range (<10 up to 100 MeV/n)