Space Weather Suite - Triple-angle Ionospheric PhotoMeter
UV spectrometry of the ionosphere performed under 3 different viewing angles
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
Part of the SWS (Space Weather Suite) package. Improved after the Ionospheric Photometer (IPM) flown on FY-3D
Ionospheric viewing from a sunsynchronous orbit. FOV: 3.5° (along-track) × 1.6° (cross-track) Three different viewing angles
30 km at the altitude of 300 km.
Coverage / Cycle
Global daily. Sampling at 20 s intervals (oxygen) and 2 s (nitrogen)
Flown on operational programme
≥2021 to ≥2026
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
Solar and space environment monitors Space radiometer or spectrometer
No WIGOS subcomponents have been defined.
Tentative Evaluation of Measurements
The following list indicates which measurements can
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