본문 바로가기
  • Home

The Spatio-temporal Characteristics of Unconventional Radiance Distribution Appearing on the SNPP VIIRS DNB Nighttime Imagery of North Korea

  • Journal of the Korean Cartographic Association
  • Abbr : JKCA
  • 2020, 20(1), pp.81-92
  • Publisher : The Korean Cartographic Association
  • Research Area : Social Science > Geography > Geography in general > Cartography
  • Received : April 1, 2020
  • Accepted : April 14, 2020
  • Published : April 30, 2020

Minho Kim 1

1상명대학교

Accredited

ABSTRACT

The VIIRS instrument is loaded in recently-launched SNPP satellite, and it can record artificial lights intensity, radiated from the Earth’s surface at night, in DNB images. They are utilized as spatial proxy data to estimate socio-economic indices such as population and gross domestic product. However, unconventional radiance, including negative and null values, would occur on VIIRS DNB imagery. Taking it into account, this research investigated the spatio-temporal distribution characteristics of abnormal radiance that could exit in the monthly VIIRS DNB images of North Korea. The unconventional radiance of North Korea could be characterized to be temporally-inequal distribution and spatially-imbalanced distribution. In addition, this study identified local striping in the monthly VIIRS DNB, which might be influenced by sensor malfunction. Such abnormal radiance would result in the biased estimate of a socio-economic index for North Korea. Therefore, future research will need to employ VIIRS DNB data analysis that considers the potential of unconventional radiance occurrence.

Citation status

* References for papers published after 2022 are currently being built.