WMO OSCAR | Details for Instrument SEM/EPS

No JavaScript detected
Usage of this Website will be severly limited without JavaScript. Please enable JavaScript in your Browser.

Instrument: SEM/EPS

Instrument details

Acronym	SEM/EPS
Full name	SEM / Energetic Particles Sensor
Purpose	Observation of electrons, protons and alpha-particles at platform level
Short description	Assemblage of detectors for the energy ranges 0.6-4 Mev (electrons), 0.74-900 MeV (protons) and 3.8-500 MeV (alpha-particles); and for magnetospheric electrons and protons in the energy ranges 80-800 keV and 30-600 keV, respectively
Background	Part of the SEM (Space Environment Monitor) package
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:	1974 to 2027
Last update:	2022-07-25

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

Geostationary Operational Environmental Satellite - 1st generation (NOAA)
- GOES-1 (see instrument status) Jan 1976 - Mar 1985
- GOES-2 (see instrument status) Sep 1977 - Jul 1993
- GOES-3 (see instrument status) Sep 1978 - Jul 1993
- GOES-4 (see instrument status) Dec 1980 - Nov 1988
- GOES-5 (see instrument status) Aug 1981 - Jul 1990
- GOES-6 (see instrument status) Jul 1983 - Jul 1989
- GOES-7 (see instrument status) May 1987 - Jan 1996
Geostationary Operational Environmental Satellite - 2nd generation (NOAA)
- GOES-8 (see instrument status) Nov 1994 - May 2004
- GOES-9 (see instrument status) Sep 1995 - May 2003
- GOES-10 (see instrument status) Jul 1998 - Dec 2006
- GOES-12 (see instrument status) Apr 2003 - May 2010
- GOES-9 (GMS backup) (see instrument status) Aug 2003 - Jul 2006
- GOES-11 (see instrument status) Jun 2006 - Dec 2011
- GOES-10 (S-America) (see instrument status) Mar 2007 - Dec 2009
- GOES-14 (see instrument status) Sep 2009 - 2027
- GOES-13 (see instrument status) Apr 2010 - Oct 2019
- GOES-15 (see instrument status) Jun 2010 - Jun 2023
- GOES-12 (S-America) (see instrument status) Aug 2010 - Aug 2013
Synchronous Meteorological Satellite (NASA)
- SMS-1 (see instrument status) Aug 1974 - Jan 1981
- SMS-2 (see instrument status) May 1975 - Aug 1982

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
Electron sensor at GEO
Proton sensor at GEO
Alpha-particle sensor at GEO

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, low, medium and high energy (up to over 1000 keV)
Alpha particles integral directional flux*	5 - marginal	No specific limitation.	Platform environment. Extended energy range (<10 to >100 MeV/n)