Passive A-band Wind Sounder (PAWS) for measuring tropospheric wind velocity profile

Grzegorz Miecznik; Robert Pierce; Pei Huang; Philip A. Slaymaker; Paul Kaptchen; Shane Roark; Brian R. Johnson; Donald F. Heath

doi:10.1117/12.734184

27 September 2007 Passive A-band Wind Sounder (PAWS) for measuring tropospheric wind velocity profile

Grzegorz Miecznik, Robert Pierce, Pei Huang, Philip A. Slaymaker, Paul Kaptchen, Shane Roark, Brian R. Johnson, Donald F. Heath

Author Affiliations +

Proceedings Volume 6677, Earth Observing Systems XII; 66771C (2007) https://doi.org/10.1117/12.734184
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

The Passive A-Band Wind Sounder (PAWS) was funded through NASA's Instrument Incubator Program (IIP) to determine the feasibility of measuring tropospheric wind speed profiles from Doppler shifts in absorption O₂ A-band. It is being pursued as a low-cost and low-risk alternative capable of providing better wind data than is currently available. The instrument concept is adapted from the Wind Imaging Interferometer (WINDII) sensor on the Upper Atmosphere Research Satellite. The operational concept for PAWS is to view an atmospheric limb over an altitude range from the surface to 20 km with a Doppler interferometer in a sun-synchronous low-earth orbit. Two orthogonal views of the same sampling volume will be used to resolve horizontal winds from measured line-of-sight winds. A breadboard instrument was developed to demonstrate the measurement approach and to optimize the design parameters for the subsequent engineering unit and future flight sensor. The breadboard instrument consists of a telescope, collimator, filter assembly, and Michelson interferometer. The instrument design is guided by a retrieval model, which helps to optimize key parameters, spectral filter and optical path difference in particular.

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Grzegorz Miecznik, Robert Pierce, Pei Huang, Philip A. Slaymaker, Paul Kaptchen, Shane Roark, Brian R. Johnson, and Donald F. Heath "Passive A-band Wind Sounder (PAWS) for measuring tropospheric wind velocity profile", Proc. SPIE 6677, Earth Observing Systems XII, 66771C (27 September 2007); https://doi.org/10.1117/12.734184

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KEYWORDS

Absorption

Signal to noise ratio

Sensors

Atmospheric modeling

Doppler effect

Interferometers

Phase shifts

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