Total electron content (TEC) Measurement Instruments

Measurements > Gravity and Magnetic Fields > Gravity, Magnetic and Geodynamic measurements > Total electron content (TEC)
Measurement Definition: Number of electrons in between two points. Observed under more viewing angles so as to generate profiles by tomography - Physical unit: [ electrons/m2 ]; practical unit: TECU = 1016 electrons/m2 - Accuracy unit: [ % ].
InstrumentStatus/
Accuracy		Instrument DescriptionMeasurement TechnologyTimeline
CEROperationalRadio transmission from e-POP to ground for radio propagation and ionospheric scintillation measurements.n/a
GNOS-1OperationalAtmospheric sounding for weather forecasting.GNSS radio-occultation receiver
GNOS-2OperationalAtmospheric sounding for weather forecasting.GNSS radio-occultation receiver
m-NLPOperationalm-NLP measures the plasma around the Earth at a higher resolution than other Langmuir probe instruments that have been flown in space.n/a
RFBOperationalMeasures total electron content in Earth’s upper atmosphere to monitor space weather.n/a
SSULIOperationalMeasures vertical profiles of the natural airglow radiation from atoms, molecules and ions in the upper atmosphere and ionosphere.n/a
TGRSOperationalTGRS is the radio occultation receiver, which will receive signals from GPS, Galileo, and Glonass.GNSS radio-occultation receiver
GNSS-RO/RBeing developedGNSS-RO/R provides GNSS Radio Occultation (RO), Reflectometry (R) and Precise Orbit Determination (POD) data for research on the sea-air interaction, the measurement of the soil properties and the detection of the icebergs, the prediction of the typhoon’s strength and path, the Earth's gravitational field, and the interferometric SAR baseline.GNSS radio-occultation receiver
SEM (FY-2)No longer operationalMeasures space environment parameters to support space craft operations.n/a
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