DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH
The International Polar Year and the proposed development of the Mackenzie Delta gas reserves will focus attention on Arctic observation in the coming years. Methods of geodetic observation will be used alongside other scientific experiments to determine the effects of man-made and global warming ch...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.575.1373 2023-05-15T14:59:19+02:00 DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH Sheng Li Matthew Tait Elizabeth Cannon The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.1373 http://plan.geomatics.ucalgary.ca/papers/Li Tait et al_Geomatica_2007.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.1373 http://plan.geomatics.ucalgary.ca/papers/Li Tait et al_Geomatica_2007.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://plan.geomatics.ucalgary.ca/papers/Li Tait et al_Geomatica_2007.pdf text ftciteseerx 2016-01-08T12:42:58Z The International Polar Year and the proposed development of the Mackenzie Delta gas reserves will focus attention on Arctic observation in the coming years. Methods of geodetic observation will be used alongside other scientific experiments to determine the effects of man-made and global warming changes to the environment, which will have impacts on civil infrastructure, and geological and ecological conditions. Changes in elevation are indicative of subsidence due to gas extraction, deepening of the permafrost active layer, the thawing of ground ice, and changes in the eco-system. The challenges of measuring elevation change in such a remote area, where there are few naturally stable areas or artificial benchmarks such as tide gauges, and where observations utilising conventional methods are hampered by the complex hydrol-ogy in the Mackenzie Delta, ensure the pre-eminence of global positioning in this area. Differential GPS (DGPS) levelling has its own unique challenges at 70º North, such as degraded satellite geometry and increased ionospheric effects. In addition, the full error budget of a DGPS method includes the signal of the survey monument in the permafrost environment, which is subject to seasonal heave and settlement. This paper reports on two studies that, combined, indicate the accuracy that can be expected using DGPS levelling onto survey monuments in permafrost at this latitude. The Arctic regions of Canada will be subject to intense study in the coming years due to the planned production of gas in the Mackenzie Delta Text Arctic Global warming Ice International Polar Year Mackenzie Delta permafrost Unknown Arctic Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) |
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English |
description |
The International Polar Year and the proposed development of the Mackenzie Delta gas reserves will focus attention on Arctic observation in the coming years. Methods of geodetic observation will be used alongside other scientific experiments to determine the effects of man-made and global warming changes to the environment, which will have impacts on civil infrastructure, and geological and ecological conditions. Changes in elevation are indicative of subsidence due to gas extraction, deepening of the permafrost active layer, the thawing of ground ice, and changes in the eco-system. The challenges of measuring elevation change in such a remote area, where there are few naturally stable areas or artificial benchmarks such as tide gauges, and where observations utilising conventional methods are hampered by the complex hydrol-ogy in the Mackenzie Delta, ensure the pre-eminence of global positioning in this area. Differential GPS (DGPS) levelling has its own unique challenges at 70º North, such as degraded satellite geometry and increased ionospheric effects. In addition, the full error budget of a DGPS method includes the signal of the survey monument in the permafrost environment, which is subject to seasonal heave and settlement. This paper reports on two studies that, combined, indicate the accuracy that can be expected using DGPS levelling onto survey monuments in permafrost at this latitude. The Arctic regions of Canada will be subject to intense study in the coming years due to the planned production of gas in the Mackenzie Delta |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sheng Li Matthew Tait Elizabeth Cannon |
spellingShingle |
Sheng Li Matthew Tait Elizabeth Cannon DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH |
author_facet |
Sheng Li Matthew Tait Elizabeth Cannon |
author_sort |
Sheng Li Matthew Tait |
title |
DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH |
title_short |
DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH |
title_full |
DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH |
title_fullStr |
DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH |
title_full_unstemmed |
DGPS LEVELLING AND MONUMENT STABILITY AT 70 ° NORTH |
title_sort |
dgps levelling and monument stability at 70 ° north |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.1373 http://plan.geomatics.ucalgary.ca/papers/Li Tait et al_Geomatica_2007.pdf |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Canada Mackenzie Delta |
geographic_facet |
Arctic Canada Mackenzie Delta |
genre |
Arctic Global warming Ice International Polar Year Mackenzie Delta permafrost |
genre_facet |
Arctic Global warming Ice International Polar Year Mackenzie Delta permafrost |
op_source |
http://plan.geomatics.ucalgary.ca/papers/Li Tait et al_Geomatica_2007.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.1373 http://plan.geomatics.ucalgary.ca/papers/Li Tait et al_Geomatica_2007.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766331431426981888 |