Glacier Applications of Erts Images
Abstract The ERTS satellite’s sun-synchronous orbit covers the entire Earth horn lat. 81° N. to 81° S. every 18 d at approximately 10.00 a.m. ground time. The scanners on board have continued to relay images to Earth from the launch on 23 July 1972 to the present (summer 1974). Images from four spec...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1975
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s002214300003450x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300003450X |
id |
crcambridgeupr:10.1017/s002214300003450x |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s002214300003450x 2024-09-15T18:15:38+00:00 Glacier Applications of Erts Images Krimmel, R. M. Meier, M. F. 1975 http://dx.doi.org/10.1017/s002214300003450x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300003450X en eng Cambridge University Press (CUP) Journal of Glaciology volume 15, issue 73, page 391-402 ISSN 0022-1430 1727-5652 journal-article 1975 crcambridgeupr https://doi.org/10.1017/s002214300003450x 2024-07-24T04:03:43Z Abstract The ERTS satellite’s sun-synchronous orbit covers the entire Earth horn lat. 81° N. to 81° S. every 18 d at approximately 10.00 a.m. ground time. The scanners on board have continued to relay images to Earth from the launch on 23 July 1972 to the present (summer 1974). Images from four spectral bands (0.5 -1 .I μm), with ground resolution of about 100 m. cover an area 185 km on a side. The resulting images have proved to be very useful for collecting certain basic data from glaciers. Long-term surface velocities are readily determined by comparison of recent ERTS images with maps that have been produced from earlier data. Images have been used 10 measure velocities on the Malaspina Glacier over a 10 year period, surge displacements on the Lowell, Tenas Tikke. and Tweedsmuir Glaciers and Lednik Medvezhiy, and velocity at the margin of the Hubbard Glacier. Many surging glaciers are readily identifiable on (he images. Coverage from the satellite will allow surging glaciers to be identified world-wide which may help glaciologists to understand their peculiar geographical distribution. Images of large glaciers taken under conditions of low sun angle and complete snow cover show previously undetected subtle slope changes which can be interpreted as dynamic How features or reflections of subglacial topography. ERTS imagery is providing new glacier data for several reasons: very large areas are covered repetitively with sufficient consistency to show subtle tonal changes, conditions of maximum and minimum snow cover, subtle morphologic features at low sun angle, and changes in position of glaciers. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 15 73 391 402 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract The ERTS satellite’s sun-synchronous orbit covers the entire Earth horn lat. 81° N. to 81° S. every 18 d at approximately 10.00 a.m. ground time. The scanners on board have continued to relay images to Earth from the launch on 23 July 1972 to the present (summer 1974). Images from four spectral bands (0.5 -1 .I μm), with ground resolution of about 100 m. cover an area 185 km on a side. The resulting images have proved to be very useful for collecting certain basic data from glaciers. Long-term surface velocities are readily determined by comparison of recent ERTS images with maps that have been produced from earlier data. Images have been used 10 measure velocities on the Malaspina Glacier over a 10 year period, surge displacements on the Lowell, Tenas Tikke. and Tweedsmuir Glaciers and Lednik Medvezhiy, and velocity at the margin of the Hubbard Glacier. Many surging glaciers are readily identifiable on (he images. Coverage from the satellite will allow surging glaciers to be identified world-wide which may help glaciologists to understand their peculiar geographical distribution. Images of large glaciers taken under conditions of low sun angle and complete snow cover show previously undetected subtle slope changes which can be interpreted as dynamic How features or reflections of subglacial topography. ERTS imagery is providing new glacier data for several reasons: very large areas are covered repetitively with sufficient consistency to show subtle tonal changes, conditions of maximum and minimum snow cover, subtle morphologic features at low sun angle, and changes in position of glaciers. |
format |
Article in Journal/Newspaper |
author |
Krimmel, R. M. Meier, M. F. |
spellingShingle |
Krimmel, R. M. Meier, M. F. Glacier Applications of Erts Images |
author_facet |
Krimmel, R. M. Meier, M. F. |
author_sort |
Krimmel, R. M. |
title |
Glacier Applications of Erts Images |
title_short |
Glacier Applications of Erts Images |
title_full |
Glacier Applications of Erts Images |
title_fullStr |
Glacier Applications of Erts Images |
title_full_unstemmed |
Glacier Applications of Erts Images |
title_sort |
glacier applications of erts images |
publisher |
Cambridge University Press (CUP) |
publishDate |
1975 |
url |
http://dx.doi.org/10.1017/s002214300003450x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300003450X |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 15, issue 73, page 391-402 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s002214300003450x |
container_title |
Journal of Glaciology |
container_volume |
15 |
container_issue |
73 |
container_start_page |
391 |
op_container_end_page |
402 |
_version_ |
1810453499026079744 |