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The YuzhSat-1 microsatellite with payload for the Aerosol-UA scientific experiment is intended for global monitoring of physical characteristics, spatial and temporal distribution of aerosols in the Earth atmosphere, drastically improving consideration of their contribution to energy budget in climate models.
The microsatellite payload measures intensity and polarization of reflected/scattered solar radiation in visible and IR bands at a low Earth orbit.
Main specifications:
| Mass, kg | 38.4 |
| Orbit: | |
| - type | circular sun-synchronous |
| - orbit altitude, km | ~705 |
| - inclination, deg | ~98.1 |
| Orientation: | |
| - type | 3-axis active |
| - actuating devices | magnetorquers, reaction wheels |
| Payload supply power, W: | |
| - maximum | 80 |
| - daily average | 20 |
| Tilting range, deg | ±35 |
| Orientation accuracy, deg | 0,2 |
| Stabilization accuracy, deg/s | 0.01 |
| Orientation determination accuracy, deg | 0.1 |
| Design life, years | 2 |
PAYLOAD BASIC SPECIFICATIONS
Aerosol-UA Scientific Equipment Complex
Scanning photometer-polarimeter (ScanPol)
|
Operating wavelength, cm |
~3.1 (X-band) |
|
Scanning along ground track from nadir, deg |
+50/-60 |
| Photometric accuracy, % | 5 (10% for 1378 nm and 1610 nm) |
| Polarimetric accuracy, % | 0.2 |
| Polarimetric stability, %/year | 0.2 |
| I, U, Q Stokes parameters in 6 spectral bands at a time | |
| Spectral bands, nm | 370, 410, 555, 865, 1380, 1610 |
| Spectral channel transmission windows, nm | 20 (60 for 1380 and 1610) |
| Signal/noise | ~2000 for albedo 0.1 and solar zenith angle 60º (400 for 370 nm channel) |
| Field of view along flight path, deg | 0.5 |
| Nadir resolution, km | ~6 |
Multispectral imager-polarimeter (MSIP)
|
Spectral bands, nm |
410, 555, 865, 1380 |
| Spectral channel transmission windows, nm | 40 (60 for 1380) |
| Signal/noise | 100 for albedo 0.1 and solar zenith angle 60º |
| Pixel size at the surface | 500 m |
| Imaging along ground track with spatial resolution in nadir, km | ~3 |
| Visual field size, deg | 60х60 |
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