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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 29 — Oct. 10, 2007
  • pp: 7196–7201

Tangent height registration method for the Version 1.4 data retrieval algorithm of the solar occultation sensor ILAS-II

Tomoaki Tanaka, Hideaki Nakajima, Takafumi Sugita, Mitsumu K. Ejiri, Hitoshi Irie, Naoko Saitoh, Yukio Terao, Hiroyuki Kawasaki, Masatoshi Usami, Tatsuya Yokota, Hirokazu Kobayashi, and Yasuhiro Sasano  »View Author Affiliations


Applied Optics, Vol. 46, Issue 29, pp. 7196-7201 (2007)
http://dx.doi.org/10.1364/AO.46.007196


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Abstract

The Improved Limb Atmospheric Spectrometer-II (ILAS-II) is a satellite-borne solar occultation sensor onboard the Advanced Earth Observing Satellite-II (ADEOS-II). The ILAS-II succeeded the ILAS. The ILAS-II used four grating spectrometers to observe vertical profiles of gas volume mixing ratios of trace constituents and was also equipped with a Sun-edge sensor to determine tangent heights geometrically with high precision. The accuracy of gas volume mixing ratios depends on the accuracy of the tangent height determination. The combination method is a tangent height registration method that was developed to give appropriate tangent heights for the ILAS-II Version 1.4 data retrieval algorithm. This study describes the method used in the ILAS-II Version 1.4 retrieval algorithm to register tangent heights. The root-sum-square total random error is estimated to be 30 m, and the total systematic error is 180 m at an altitude of 30 km. The influence of the tangent height errors on the vertical profiles of gas volume mixing ratios in ILAS-II Version 1.4 is estimated by using the relative difference. The relative difference for each species is within 7% (20%) for an altitude shift of ± 100   m ( ± 300   m ) .

© 2007 Optical Society of America

OCIS Codes
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(280.0280) Remote sensing and sensors : Remote sensing and sensors

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 30, 2007
Manuscript Accepted: August 20, 2007
Published: October 4, 2007

Citation
Tomoaki Tanaka, Hideaki Nakajima, Takafumi Sugita, Mitsumu K. Ejiri, Hitoshi Irie, Naoko Saitoh, Yukio Terao, Hiroyuki Kawasaki, Masatoshi Usami, Tatsuya Yokota, Hirokazu Kobayashi, and Yasuhiro Sasano, "Tangent height registration method for the Version 1.4 data retrieval algorithm of the solar occultation sensor ILAS-II," Appl. Opt. 46, 7196-7201 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-29-7196


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References

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