Optical designs for a multi-beam 340 and 625/640 GHz Spaceborne climate research instrument
Conference contribution, 2015

We report on an ongoing study where different optical configurations for a multi-beam limb-viewing (four to eight receiver channels at 340 and two channels at 625 GHz) space-borne instrument for climate research are presented and compared. The optical configurations are analyzed in terms of optical performance (gain, side lobe levels, beam efficiency etc.), weight and size of the overall instrument envelope. Using ideal fundamental Gaussian beam modes and numerical tools relying on ray-tracing and physical optics methods, the different configurations are designed and evaluated. Preliminary results indicate that a 1.3 m × 0.65 m primary reflector can be used in a configuration that includes a relay optics system having two to four elements. In addition to the limb-viewing instrument, there will be an additional instrument operating at 640 GHz for observing clouds in nadir mode.

Author

Arvid Hammar

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

A. Emrich

Omnisys Instruments

D. McCarthy

Maynooth University

A. Murphy

Maynooth University

N. Trappe

Maynooth University

Jan Stake

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

26th International Symposium on Space Terahertz Technology, ISSTT 2015; Cambridge; US

P-11

Subject Categories

Astronomy, Astrophysics and Cosmology

Atom and Molecular Physics and Optics

Electrical Engineering, Electronic Engineering, Information Engineering

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9/6/2018 1