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Instrument details
Acronym
CORISS
Full name
C/NOFS Occultation Receiver for Ionospheric Sensing and Specification
Purpose
Measurement of line-of-sight TEC and scintillations, and stratospheric temperature.
Short description
Dual-frequency receiver to track GPS satellites during the rising and setting phases.
Background
Consolidated technology.
Scanning Technique
Limb observation of GPS signals during occultation by the omnidirectional antenna
Resolution
About 300 km horizontal, 0.5 km vertical
Coverage / Cycle
1 GNSS constellation tracked. About 200 soundings/day - Average spacing 1600 km - Global coverage (300 km spacing) in 28 days
Mass
3 kg
Power
10 W
Data Rate
0.5 kbps
Providing Agency
NASA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
2008 to 2015-11-28
Last update:
2019-01-01
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
Instrument classification
Earth observation instrument Active and radio-occultation sensor GNSS radio-occultation
WIGOS Subcomponents
No WIGOS subcomponents have been defined.
Mission objectives
Primary mission objectives Electron Density Ionospheric Scintillation Ionospheric Vertical Total Electron Content (VTEC) Secondary mission objectives Atmospheric density Atmospheric temperature Height of the tropopause Temperature of the tropopause Opportunity objectives Show all Show fewer
Tentative 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
Variable Relevance for measuring this variable Operational limitations Explanation
Atmospheric temperature 4 - fair Inaccurate in low troposphere. Omni-directional antenna, one GNSS system tracked, covering about 200 soundings/day,
Geoid 4 - fair Highly indirect. Radio-occultation processing implies precise orbitography. Geoid derived from multi-temporal analysis
Gravity field 5 - marginal Highly indirect. Radio-occultation processing implies precise orbitography. Gravity field derived from multi-temporal analysis
Height of the tropopause 4 - fair No specific limitation. Omni-directional antenna, one GNSS system tracked, about 200 soundings/day. Tropopause height measured as discontinuity of the refraction index
Temperature of the tropopause 4 - fair No specific limitation. Omni-directional antenna, one GNSS system tracked, about 200 soundings/day. Tropopause height measured as discontinuity of the refraction index
Atmospheric density 1 - primary No specific limitation. Measuring atmospheric density
Electron Density 1 - primary Partial information (geoid).. No specific limitation. Omni-directional antenna, one GNSS system tracked, about 200 soundings/day,
Ionospheric Vertical Total Electron Content (VTEC) 4 - fair No specific limitation. Omni-directional antenna, one GNSS system tracked, about 200 soundings/day,
Ionospheric Scintillation 5 - marginal No specific limitation. Omni-directional antenna, one GNSS system tracked, about 200 soundings/day,
Instrument: CORISS