@inbook{a969690f4d2c484b80d81ed234821003,
title = "Investigations of satellite images",
abstract = "The National Aeronautics and Space Administration (NASA) of the United States on 23rd July 1972 launched a satellite with the purpose of investigating the Earth's natural resources and their potential use. The satellite, named ERT8-1 (Earth Resources Technology Satellite), circles the globe 14 times a day in a near-polar, sunsynchronous orbit at a height of 912 km and produces images in 4 spectral bands. Each image covers an area of 185 X 185 km. The image data is stored at the Eros Data Center in the U.S.A. and from there made available for scientific investigation in all countries.",
author = "Niels Henriksen",
year = "1975",
month = dec,
day = "31",
doi = "10.34194/rapggu.v75.7434",
language = "English",
series = "Rapport Gr{\o}nlands Geologiske Unders{\o}gelse",
publisher = "Gr{\o}nlands Geologiske Unders{\o}gelse",
pages = "13",
booktitle = "Report of activities, 1974",
}