Radiometric cross-calibration of polar orbital sensors using Geostationary Ocean Color imager (Goci)

Wook Park, Joong Sun Won

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The possibility of radiometric cross-calibration between a Geostationary Ocean Color Image (GOCI) and polarorbital sensors is discussed. A sensor on a geostationary satellite is useful for the cross-calibration with sensors mounted on polar orbit satellites due to frequent data acquisition. The GOCI has a limitation on precisely measuring the reflectance of land objects because spectral setting of the GOCI is originally designed for ocean monitoring, and therefore GOCI images must be carefully calibrated first with a help of in-situ data to be used as a standard image. Preliminary results from the comparison between the GOCI and MODIS AQUA are presented. Test sites were selected from a snow cover in Baekdu-san (or Mt. Baekdu), a playa and a sand dune in the Inner Mongolia, and snow cover or water (seasonal) in the Hankka Lake. The results showed the GOCI data is good for cross-calibration as defined by spectral differences less than 7% under various conditions (four bands and four different surface conditions) compared with a simulated GOCI radiance from MODIS AQUA land bands. Correlation coefficient R2 was over 0.93 in most cases. Scale effect due to surface inhomogeneity and different spatial resolutions between different sensors will be further examined in the near future. The geostationary sensor can be utilized for radiometric cross-calibration of SENTINEL-2.

Original languageEnglish
Title of host publicationProceedings of 1st Sentinel-2 Preparatory Symposium
Publication statusPublished - 2012 Dec 19
Event1st Sentinel-2 Preparatory Symposium - Frascati, Italy
Duration: 2012 Apr 232012 Apr 27

Publication series

NameEuropean Space Agency, (Special Publication) ESA SP
Volume707 SP
ISSN (Print)0379-6566

Other

Other1st Sentinel-2 Preparatory Symposium
CountryItaly
CityFrascati
Period12/4/2312/4/27

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

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    Park, W., & Won, J. S. (2012). Radiometric cross-calibration of polar orbital sensors using Geostationary Ocean Color imager (Goci). In Proceedings of 1st Sentinel-2 Preparatory Symposium (European Space Agency, (Special Publication) ESA SP; Vol. 707 SP).