Onboard Infrared Fourier Spectrometer
Glavkosmos
An infrared Fourier spectrometer designed for spacecraft to measure outgoing thermal radiation spectra with high spectral resolution for operational meteorology and climatology.
Key figurescomparable across the catalogue
- Mass
- 50 kg
- Power
- 50 W
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Operation specrtal range
- 5-15 mkm
- Spectral resolution, no more
- 0.5 1/sm
- Threshold spectral brightness (nesr), (mw*sm)/ (m2*average)
- 0.15-0.45
- The measurement error of the spectral brightness of the object (in terms of equivalent temperature) at a wavelength of 11 ... 12 microns and at an object temperature of 280 ... 300 k
- 0.5 K
- Swath width
- to 2500 km
- Spatial resolution in nadir
- 30 km
- Interferogram filming time
- 0.5 s
- Mass
- 50 kg
- Power consumption (average per revolution)
- 50 W
- Imformation flow
- 600 kbit/s
About
The Onboard Infrared Fourier Spectrometer is an infrared instrument designed to measure the spectra of outgoing thermal radiation from the surface-atmosphere system with high spectral resolution. Its primary purpose is to obtain global data for numerical weather prediction and climate studies. This includes providing vertical profiles of temperature in the troposphere and lower stratosphere with an error of 1-2 K, vertical profiles of humidity in the troposphere with an error of no more than 30%, total ozone content with an error not less than 5% and the vertical O3 profile in the ozone layer with an error of 15%, and temperature of the underlying surface with an error of 0.5 K (at a wavelength of 11-12 microns and object temperature of 280-300 K). The instrument features a sealed opto-mechanical unit mounted on the spacecraft platform, with the electronic module housed in the pressurized cabin. It performs scanning across the span in the direction transverse to the spacecraft’s flight path. The mechanism for changing the optical path difference is a “double pendulum” with corner reflectors. It incorporates a radiation cooler for cooling the photodetector (SRT-photoresistor) and a unit of lasers in the reference channel to ensure spectral measurement binding. Periodic observation of reference sources (airborne blackbody and space) is used for radiometric measurement calibration.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.