Initial on-orbit modulation transfer function performance analysis for geostationary ocean color imager

Eunsong Oh, Sug Whan Kim, Seongick Cho, Joo Hyung Ryu, Yu Hwan Ahn

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The world's first geostationary ocean color imager (GOCI) is a three-mirror anastigmat optical system 140mm in diameter. Designed for 500 m ground sampling distance, this paper deals with on-orbit modulation transfer function (MTF)measurement and analysis for GOCI. First, the knife-edge and point source methods were applied to the 8th band (865 nm) image measured April 5th, 2011. The target details used are the coastlines of the Korean peninsula and of Japan, and an island 400 meters in diameter. The resulting MTFs are 0.35 and 0.34 for the Korean East Coastline and Japanese West Coastline edge targets, respectively, and 0.38 for the island target. The daily and seasonal MTF variations at the Nyquist frequency were also checked, and the result is 0.32 ± 0.04 on average. From these results, we confirm that the GOCI on-orbit MTF performance satisfies the design requirements of 0.32 for 865nm wavelength.

Original languageEnglish
Pages (from-to)199-208
Number of pages10
JournalJournal of Astronomy and Space Sciences
Volume29
Issue number2
DOIs
Publication statusPublished - 2012 Jun

Fingerprint

modulation transfer function
transfer function
oceans
orbits
color
coast
Nyquist frequencies
point source
peninsulas
point sources
wavelength
Japan
sampling
mirrors
requirements
GOCI
analysis
wavelengths

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Earth and Planetary Sciences(all)

Cite this

Oh, Eunsong ; Kim, Sug Whan ; Cho, Seongick ; Ryu, Joo Hyung ; Ahn, Yu Hwan. / Initial on-orbit modulation transfer function performance analysis for geostationary ocean color imager. In: Journal of Astronomy and Space Sciences. 2012 ; Vol. 29, No. 2. pp. 199-208.
@article{41ed82a86ea349318df9ae3c37e866c2,
title = "Initial on-orbit modulation transfer function performance analysis for geostationary ocean color imager",
abstract = "The world's first geostationary ocean color imager (GOCI) is a three-mirror anastigmat optical system 140mm in diameter. Designed for 500 m ground sampling distance, this paper deals with on-orbit modulation transfer function (MTF)measurement and analysis for GOCI. First, the knife-edge and point source methods were applied to the 8th band (865 nm) image measured April 5th, 2011. The target details used are the coastlines of the Korean peninsula and of Japan, and an island 400 meters in diameter. The resulting MTFs are 0.35 and 0.34 for the Korean East Coastline and Japanese West Coastline edge targets, respectively, and 0.38 for the island target. The daily and seasonal MTF variations at the Nyquist frequency were also checked, and the result is 0.32 ± 0.04 on average. From these results, we confirm that the GOCI on-orbit MTF performance satisfies the design requirements of 0.32 for 865nm wavelength.",
author = "Eunsong Oh and Kim, {Sug Whan} and Seongick Cho and Ryu, {Joo Hyung} and Ahn, {Yu Hwan}",
year = "2012",
month = "6",
doi = "10.5140/JASS.2012.29.2.199",
language = "English",
volume = "29",
pages = "199--208",
journal = "Journal of Astronomy and Space Science",
issn = "2093-5587",
publisher = "The Korean Space Science Society",
number = "2",

}

Initial on-orbit modulation transfer function performance analysis for geostationary ocean color imager. / Oh, Eunsong; Kim, Sug Whan; Cho, Seongick; Ryu, Joo Hyung; Ahn, Yu Hwan.

In: Journal of Astronomy and Space Sciences, Vol. 29, No. 2, 06.2012, p. 199-208.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Initial on-orbit modulation transfer function performance analysis for geostationary ocean color imager

AU - Oh, Eunsong

AU - Kim, Sug Whan

AU - Cho, Seongick

AU - Ryu, Joo Hyung

AU - Ahn, Yu Hwan

PY - 2012/6

Y1 - 2012/6

N2 - The world's first geostationary ocean color imager (GOCI) is a three-mirror anastigmat optical system 140mm in diameter. Designed for 500 m ground sampling distance, this paper deals with on-orbit modulation transfer function (MTF)measurement and analysis for GOCI. First, the knife-edge and point source methods were applied to the 8th band (865 nm) image measured April 5th, 2011. The target details used are the coastlines of the Korean peninsula and of Japan, and an island 400 meters in diameter. The resulting MTFs are 0.35 and 0.34 for the Korean East Coastline and Japanese West Coastline edge targets, respectively, and 0.38 for the island target. The daily and seasonal MTF variations at the Nyquist frequency were also checked, and the result is 0.32 ± 0.04 on average. From these results, we confirm that the GOCI on-orbit MTF performance satisfies the design requirements of 0.32 for 865nm wavelength.

AB - The world's first geostationary ocean color imager (GOCI) is a three-mirror anastigmat optical system 140mm in diameter. Designed for 500 m ground sampling distance, this paper deals with on-orbit modulation transfer function (MTF)measurement and analysis for GOCI. First, the knife-edge and point source methods were applied to the 8th band (865 nm) image measured April 5th, 2011. The target details used are the coastlines of the Korean peninsula and of Japan, and an island 400 meters in diameter. The resulting MTFs are 0.35 and 0.34 for the Korean East Coastline and Japanese West Coastline edge targets, respectively, and 0.38 for the island target. The daily and seasonal MTF variations at the Nyquist frequency were also checked, and the result is 0.32 ± 0.04 on average. From these results, we confirm that the GOCI on-orbit MTF performance satisfies the design requirements of 0.32 for 865nm wavelength.

UR - http://www.scopus.com/inward/record.url?scp=84863621991&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863621991&partnerID=8YFLogxK

U2 - 10.5140/JASS.2012.29.2.199

DO - 10.5140/JASS.2012.29.2.199

M3 - Article

AN - SCOPUS:84863621991

VL - 29

SP - 199

EP - 208

JO - Journal of Astronomy and Space Science

JF - Journal of Astronomy and Space Science

SN - 2093-5587

IS - 2

ER -