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IMAGE QUALITY EVALUATION ON PRISM AND AVNIR-2

Akira Mukaida(1), Naritoshi Imoto(1), Sachi Kawamoto(1), Takeo Tadono(2) and Hiroshi Murakami(2)

(1) ALOS Data Analysis and Research Prj. Grp., Remote Sensing Techno. Center of Japan, Tsukuba, Japan
(2) Earth Observation Research Center, Japan Aerospace Exploration Agency, Tsukuba, Japan

Abstract

The Advanced Land Observing Satellite (ALOS) was launched on Jan 24th, 2006 by a Japan Aerospace Exploration Agency (JAXA) H-IIA launcher. It carries two optical remote sensing instruments: Advanced Visible and Near Infrared Radiometer type-2 (AVNIR-2) and Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) and synthetic aperture radar: Phased Array Type L-band Synthetic Aperture Radar (PALSAR).

JAXA/EORC has been worked for calibration and validation of ALOS instruments to keep and up grading the quality of the data. This presentation describes image quality evaluation on both optical sensors (PRISM and AVNIR-2). Images from both sensors have been evaluated in terms of Modulation Transfer Function (MTF) and Signal to Noise Ratio (SNR). And evaluation of PRISM image which processed by updated algorithm have better result in terms of SNR. Also describes about The quality of PRISM image taken by gain 1 and JPEG noise filtered image have been also evaluated and described.

Keywords; Calibration, Image quality, Modulation Transfer Function and SNR.

 

 

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