Skip to Main Content

Pipeline Integrity Management Under Geohazard Conditions (PIMG)

By
Mamdouh M. Salama
Mamdouh M. Salama
ConocoPhillips
Search for other works by this author on:
Yong-Yi Wang
Yong-Yi Wang
CRES
Search for other works by this author on:
Don West
Don West
Golder
Search for other works by this author on:
Alexander McKenzie-Johnson
Alexander McKenzie-Johnson
Geosyntec
Search for other works by this author on:
Azam B A-Rahman
Azam B A-Rahman
Petronas
Search for other works by this author on:
Guiyi Wu
Guiyi Wu
TWI
Search for other works by this author on:
Jens Petter Tronskar
Jens Petter Tronskar
DNVGL
Search for other works by this author on:
Jim Hart
Jim Hart
SSD Inc
Search for other works by this author on:
Bernt J. Leira
Bernt J. Leira
NTNU
Search for other works by this author on:
ISBN:
9780791861998
No. of Pages:
412
Publisher:
ASME Press
Publication date:
2020

ABSTRACT

The potential value of Synthetic Aperture Radar interferometry (InSAR) to detect and quantify Earth surface changes has been recognized for more than 25 years. The European Space Agency (ESA) relatively recently established the Copernicus Program with a satellite constellation that includes a pair of newer satellites, Sentinel-1A and Sentinel-1B. These satellites are in a near-polar, sun-synchronous orbit. They share the same orbital plane with a 180° orbital phasing difference, and carry a C-band synthetic aperture radar active sensor which is applicable for many scientific purposes, including all-weather, day and night data collection. C-band radar sensors have 6-cm wavelength which is suitable for detecting changes as small as ~3 cm per cycle. The pair of satellites are complimentary with one having an ascending view direction and the other a descending view direction, and acquiring repeated 6-m pixel size coverage of the Earth every 12 days.

Satellite radar interferometry is the difference in distance from the satellite to the ground between two radar scenes acquired from the same position on its orbit. An initial data processing step is calculation of a coherence diagram which compares the distance to all pixels in the pair of radar scenes to each other relative to one wavelength (± 3 cm). Interferograms with good coherence are suitable for small-scale distance change detection, whereas poor coherence may indicate large-scale distance changes or some other type of major change, such as a wild fire. Examples of changes suitable for use in pipeline geohazard management that are related to ground surface subsidence over underground potash mines are in the form of areal changes with color bands of distance change, known as fringes, and profiles of distance change extracted from the 6-m pixel interferograms using geographic information system (GIS) utilities.

You do not currently have access to this chapter.
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal