Masanobu Shimada
ADEOS Science Program Coordinator
Earth Observation Research and application Center, National Space Development Agency of Japan

Background and Objectives

Calibration of the ADEOS sensors is the key activity in guaranteeing ADEOS data quality. While several calibration methods are proposed, direct and simultaneous comparison of the spaceborne instruments with qualified airborne instruments is the simplest and most reliable method. NASA and JAXA have already conducted a joint calibration campaign for OPS of Japanese Earth Resources Satellite-1 (JERS-1) using the Advanced Visible and Infrared Imaging Spectrometer (AVIRIS). This experiment revealed that the AVIRIS system can satisfactorily calibrate the visible and near infrared radiometers. Based on this historical background, the joint calibration of the ADEOS sensors will be conducted by NASA's AVIRIS system. In order to calibrate data from OCTS, AVNIR, and POLDER, AVIRIS will fly under ADEOS twice a year.

Current Status and Schedule

ADEOS sensor data (AVNIR, OCTS, and POLDER) will be calibrated by simultaneous AVIRIS underflights and ground measurements. The proposed test sites are Lunar lake (NV), Ivanpah playa (CA), Rogers Dry lake (CA) in the western deserts, Lake Tahoe (CA) and the coast of the US off San Diego (CA).

In order for JAXA to distribute the calibrated AVNIR and OCTS data eight months (goal) after the ADEOS launch, the first experiment is planned for February of 1997. From then, similar experiments will be conducted every six months at the same test sites. All the campaign-related data will be available to the researchers.


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