Share Email Print
cover

Proceedings Paper

RapidEye constellation relative radiometric accuracy measurement using lunar images
Author(s): Joe Steyn; George Tyc; Keith Beckett; Yoshi Hashida
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The RapidEye constellation includes five identical satellites in Low Earth Orbit (LEO). Each satellite has a 5-band (blue, green, red, red-edge and near infrared (NIR)) multispectral imager at 6.5m GSD. A three-axes attitude control system allows pointing the imager of each satellite at the Moon during lunations. It is therefore possible to image the Moon from near identical viewing geometry within a span of 80 minutes with each one of the imagers. Comparing the radiometrically corrected images obtained from each band and each satellite allows a near instantaneous relative radiometric accuracy measurement and determination of relative gain changes between the five imagers. A more traditional terrestrial vicarious radiometric calibration program has also been completed by MDA on RapidEye. The two components of this program provide for spatial radiometric calibration ensuring that detector-to-detector response remains flat, while a temporal radiometric calibration approach has accumulated images of specific dry dessert calibration sites. These images are used to measure the constellation relative radiometric response and make on-ground gain and offset adjustments in order to maintain the relative accuracy of the constellation within ±2.5%. A quantitative comparison between the gain changes measured by the lunar method and the terrestrial temporal radiometric calibration method is performed and will be presented.

Paper Details

Date Published: 23 September 2009
PDF: 12 pages
Proc. SPIE 7474, Sensors, Systems, and Next-Generation Satellites XIII, 74740Y (23 September 2009); doi: 10.1117/12.829728
Show Author Affiliations
Joe Steyn, MacDonald, Dettwiler & Associates Ltd. (Canada)
George Tyc, MacDonald, Dettwiler & Associates Ltd. (Canada)
Keith Beckett, MacDonald, Dettwiler & Associates Ltd. (Canada)
Yoshi Hashida, Surrey Satellite Technology Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 7474:
Sensors, Systems, and Next-Generation Satellites XIII
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

© SPIE. Terms of Use
Back to Top