ISSTT Proceedings

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The STEAMR instrument

Authors:
Anders Emrich, U. Frisk, P. Sobis, J. Embretsen, K. Kempe, S. Andersson, A. Murk, M. Whale, A. Hammar, C. Emrich
Abstract:
The envisaged limb viewing of STEAMR is based on a staring concept with 14 beams, polarised at ± 45 degrees, covering a nominal altitude range of 6-28 km at mid latitudes. The complete STEAMR instrument will be presented on system level, including antenna, optics, calibration system, focal plane array, 340 GHz front-ends and 12 GHz wide back-ends. Omnisys is now prime for the STEAMR instrument and is performing prototyping work for 4 complete radiometer channels of the 14 planned for the flight instrument in parallel to system studies towards ESA for the Premier satellite platform. Test results will be presented. Parts of the optics (IAP) and the calibration system is also being prototyped and the complete instrument development plan has now been addressed and presented. The current optical design concept is based on a six-mirror system, including a Ritchey-Chretien telescope that routes the incoming beam to the focal plane unit and the optics is diffraction-limited by the 1.6 x 0.8 m aperture of the primary reflector. The calibration system consist of a beam chopper and a reference selector and the references will be two absorptive loads at different temperatures, a nadir view (TBC) and CW source to test sideband conversion ratio and signal response of the complete receiver chain.
Categories:
Systems
Year:
2012
Session:
1
Full-text:
Download a PDF of this paper.
Page Number(s):
8