HR: 1340h
AN: A13D-1509    [Abstracts]
TI: Airborne SWIR FTS for GOSAT validation
AU: * SUTO, H
EM: suto.hiroshi@jaxa.jp
AF: Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, 305-8505, Japan
AU: KUZE, A
EM: kuze.akihiko@jaxa.jp
AF: Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, 305-8505, Japan
AU: KANEKO, Y
EM: kaneko.yutaka@jaxa.jp
AF: Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, 305-8505, Japan
AU: NAKAJIMA, M
EM: nakajima.masakatsu@jaxa.jp
AF: Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, 305-8505, Japan
AU: HAMAZAKI, T
EM: hamazaki.takashi@jaxa.jp
AF: Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, 305-8505, Japan
AU: YOKOTA, T
EM: yoko@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: INOUE, G
EM: inouegen@nagoya-u.jp
AF: Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
AB: In order to validate and calibrate the GOSAT satellite data, and also to develop the retrieval algorism for deriving the column density of CO₂ and CH₄, the airborne SWIR (Short Wave Infrared Region) FTS (Fourier transform spectrometer) has been developed and demonstrated. This instrument is called TSUKUBA model. TSUKUBA uses the same interferometer as the GOSAT-TANSO-FTS on the single optical box with temperature and humidity control system. This instrument is capable of measuring the same region of interest as GOSAT- TANSO-SWIR. These detectable region are as follows; Band1:12800 – 13200 cm^-1, Band2:5800 – 6400cm^-1, and Band3:4700 – 5200cm^-1, respectively. The FTS has +/- 2.5cm maximum optical path difference, and the signal is sampled with the 1.31um laser fringes with the 40 kHz of optimal sampling rate. The aperture size is 67mm, which is the same as TANSO-FTS, the size of IFOV is 240 m from 15 km altitude. The initial performance test of TSUKUBA was carried out in our laboratory, the measured value of modulation efficiencies are 70% (Band1), 85% (Band2) and 88% (Band3), respectively. The SNR values with the equivalent black body temperature for 30% surface albedo are 220 (13050cm^-1), 168 (6200cm^-1), and 184 (5000cm^-1). And also, the measured values of full width at half maximum (FWHM) of instrumental line shape functions are 0.37cm^-1, 0.26cm^-1, 0.25 cm^-1 for band 1, 2, and 3, respectively. The instrumental design and the results of performance tests will be presented as well as the validation experiment.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0394 Instruments and techniques
DE: 1610 Atmosphere (0315, 0325)
DE: 1640 Remote sensing (1855)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting