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Instrument details
Acronym
DIFOS
Full name
Solar Flux Optical Photometer
Purpose
Observation of global solar irradiance oscillations
Short description
Three-channel radiometer: one for total irradiance (0.4-1.0 μm), one around 0.55 μm with bandwidth 0.1 μm, one around 0.75 μm with bandwidth 0.1 μm. Time resolution 16 s
Background
Consolidated technology
Scanning Technique
Sun pointing
Resolution
N/A
Coverage / Cycle
Full Sun disk
Mass
6 kg
Power
18 W
Data Rate
Providing Agency
Roscosmos
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
1994 to 1994-07-15
Last update:
2016-11-07
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 Passive optical radiometer or spectrometer Solar irradiance monitor
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
Downward short-wave irradiance at TOA 4 - fair No specific limitation. TSI over the range UV, VIS and part of NIR
Instrument: DIFOS