Radiometric Cross Calibration of AVNIR-2 and MODIS Using Directional Functions of Top-of-Atmosphere Reflectance

DOI Web Site 4 Citations 13 References
  • MURAKAMI Hiroshi
    Japan Aerospace Exploration Agency, Earth Observation Research Center
  • TADONO Takeo
    Japan Aerospace Exploration Agency, Earth Observation Research Center
  • SHIMADA Masanobu
    Japan Aerospace Exploration Agency, Earth Observation Research Center

Bibliographic Information

Other Title
  • 大気上端反射率の方向性関数を用いたAVNIR-2とMODISの相互輝度校正
  • タイキ ジョウタン ハンシャリツ ノ ホウコウセイ カンスウ オ モチイタ AVNIR 2 ト MODIS ノ ソウゴ キド コウセイ

Search this article

Description

An effective cross-calibration scheme is proposed and used for evaluation of AVNIR-2 radiometric accuracy. The scheme uses top-of-atmosphere reflectance functions of satellite zenith angle at each sample point. Each function was made using MODIS 500 m observations at temporally and spatially stable ground sites over 16 days which includes an AVNIR-2 observation date. As the result, radiances of AVNIR-2 channels 1 (463 nm), 2 (560 nm) and 3 (652 nm) agreed well to the radiances of Aqua and Terra MODIS channels 3 (466 nm), 4 (554 nm) and 1 (646 nm) respectively within 5% accuracy. AVNIR-2 Channel 4 (821 nm) radiance was evaluated lower than that of MODIS channel 2 (856 nm) about 15% on average. If we considered influences of atmospheric absorption and spectral slope of the ground sites, the AVNIR-2 channel-4 difference against MODIS was estimated to be lass than half of the 15%. This cross-calibration scheme among similar orbit satellite sensors can provide many samples which enable us to analyze sensor response dependency on different observation conditions such as sensor-pointing angles.

Journal

Citations (4)*help

See more

References(13)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top