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Instrument details
Acronym
SWS/Tri-IPM
Full name
Space Weather Suite - Triple-angle Ionospheric PhotoMeter
Purpose
UV spectrometry of the ionosphere performed under 3 different viewing angles
Short description
Observation of the night-sky 135.6 nm oxygen airglow intensity for the retrieval of ionospheric total electrons and NmF2 (sensitivity ≥150 counts.s-1.R-1); and observation of the bright-day 135.6 nm oxygen air glow intensity and the nitrogen air glow intensity of LBH (140-180 nm）(sensitivity≥1 counts.s-1.R-1) for the retrieval of oxygen-nitrogen ratio at the ionospheric altitude. Three units which point in different directions
Background
Part of the SWS (Space Weather Suite) package. Improved after the Ionospheric Photometer (IPM) flown on FY-3D
Scanning Technique
Ionospheric viewing from a sunsynchronous orbit. FOV: 3.5° (along-track) × 1.6° (cross-track) Three different viewing angles
Resolution
30 km at the altitude of 300 km.
Coverage / Cycle
Global daily. Sampling at 20 s intervals (oxygen) and 2 s (nitrogen)
Mass
Power
Data Rate
Providing Agency
CMA
Instrument Maturity
Flown on operational programme
Utilization Period:
≥2021-10 to ≥2026
Last update:
2021-05-26
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
Solar and space environment monitors Space radiometer or spectrometer
WIGOS Subcomponents
No WIGOS subcomponents have been defined.
Mission objectives
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
UV flux 1 - primary No specific limitation. Earth's limb and surface observed, wide dynamic range
UV sky image 1 - primary No specific limitation. Earth's limb observed, high spatial resolution
Instrument: SWS/Tri-IPM