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: http://space.univ.kiev.ua/projects/warning/sich.html
Дата изменения: Tue Feb 15 16:50:44 2000 Дата индексирования: Mon Oct 1 22:03:14 2012 Кодировка: Поисковые слова: ori |
Measurement principle
Infrared Fourier-transform spectrometer SICH-F is intended for spectral distribution power measuring of atmospheric and ionospheric emissions in range of 2 - 9 mkm and it's height distribution. Instrument work regimes: 1) Inside. 2) Calibration at inside standard sources 2 - 4 times per a rotation. 3) Calibration at "free space" 2 - 4 times per a rotation. 4) Infrared radiation measuring 10 - 40 min. per a rotation.
Experiment configuration and heritage
Spectrometer consists of the photodetector block and the block of signal processing and control.
Photodetector block is set onto external surface of station. Optical axis direction 1 is set at angle of 18° to satellite velocity vector and it is located in plane «velocity vector - Nadir».
- Optical axis scanning 1 - +5 –30 deg
- Optical axis direction 2 - Zenith +-50 deg
- There haven't to be satellite device details into space angle +20 deg
Diagnostic information and attach data will transfer by state telemetric channels.
Four digital channels:
1. Detector temperature.
2. Engine temperature.
3. Absolute black body temperature.
4. Beamsplitter temperature.
Three analog channels:
1. Reper mark frequency.
2. Black body current.
3. Signal roughly.
Digital 5 channels:
1. Calibration 1.
2. Calibration 2.
3. Calibration 3.
4. Calibration 4.
Main characteristic of the SICH-F instrument
Sight field: 0.5 degree
Space resolution: 5 km (vertically)
Spectral resolution 2 cm
Time resolution 1 - 4 s
Demands for device:
Total weight < 18 kg
Data to go out from instrument is separated for two types:
scientific data and technical ones (diagnostic) that testifies about capacity for work of instrument at all and it's separate system condition.
This data enters with each measuring and is necessary for discipherring and interpretation obtained results:
It should have consistent channel of RS232 type or like to it. Total volume of receive information is resulted in point 8 it's TCh.
Diagnostic information and attach data will transfer by state telemetric channels.
For one cycle for one for of measuring rotation 24 hours
Regime "L" 4 2400-4800 till 115000
Regime "Sh" 8 4800-9600 till 230000