Application of GPS phase delay measurements in radio science and atmospheric studies
Application of GPS phase delay measurements in radio science and atmospheric studies
- Author(s): O.T. Davies ; C.N. Mitchell ; P.S.J. Spencer ; J.D. Nash ; R.J. Watson ; P.A. Watson
- DOI: 10.1049/ip-map:20040126
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- Author(s): O.T. Davies 1 ; C.N. Mitchell 2 ; P.S.J. Spencer 3 ; J.D. Nash 4 ; R.J. Watson 2 ; P.A. Watson 2
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View affiliations
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Affiliations:
1: CLRC Chilbolton Observatory, Chilbolton, UK
2: Department of Electronic and Electrical Engineering, University of Bath, Bath, UK
3: Department of Electronic and Electrical Engineering, Met. Office, Wokingham, UK
4: Department of Electronic and Electrical Engineering, University of Colorado, Boulder, USA
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Affiliations:
1: CLRC Chilbolton Observatory, Chilbolton, UK
- Source:
Volume 151, Issue 1,
February 2004,
p.
1 – 6
DOI: 10.1049/ip-map:20040126 , Print ISSN 1350-2417, Online ISSN 1359-706X
Observation of phase delay from GPS satellites, combined with advanced software processing, allows the quantity of water vapour in the atmosphere to be continuously monitored. This paper reports on four years of measurements and analytical studies directed towards establishing the accuracy of the technique. It also examines the role of horizontal gradients of wet delay in determining accuracy, and evaluates the potential of extending the technique to measurement of radio refractivity gradients using a tomographic inversion technique.
Inspec keywords: meteorology; atmospheric humidity; refractive index; Global Positioning System; tomography; delays; gradient methods; radio links
Other keywords:
Subjects: Optimisation techniques; Satellite communication systems; Edge and boundary effects; optical reflection and refraction; Radionavigation and direction finding; Distributed parameter control systems; Optical constants and parameters (condensed matter); Numerical approximation and analysis; Optimisation techniques; Water in the atmosphere (humidity, clouds, evaporation, precipitation)
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