Estimation of Spatial Global Positioning System Zenith Delay observation error covariance

Reima Eresmaa; Heikki Järvinen

doi:10.3402/tellusa.v57i2.14611

Estimation of Spatial Global Positioning System Zenith Delay observation error covariance

Tellus

Volume 57 (2005): Issue 2

By: Reima Eresmaa and Heikki Järvinen

Open Access

|Jan 2005

Abstract

In this paper, we present new methods and estimates of the spatial (horizontal) covariance of the ground-based Global Positioning System Zenith Delay observation errors. An algorithm is developed which enables estimation of the observation error covariance as a linear combination of innovation covariances of Zenith Total Delay (ZTD) at ground-based receiver stations, surface pressure at synoptic stations and integrated water vapour at radiosonde stations, respectively. Innovation (observation minus model background) sequences computed with the High-Resolution Limited Area Model (HIRLAM) are used as statistical material for the estimation.We present a four-parameter exponential observation error covariance model for the ZTD horizontal observation error covariance. Seasonal and yearly mean models are provided for implementation into meteorological data assimilation systems.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v57i2.14611 | Journal eISSN: 3035-9554

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Language: English

Page range: 194 - 203

Submitted on: Mar 31, 2004

Accepted on: Sep 13, 2004

Published on: Jan 1, 2005

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2005 Reima Eresmaa, Heikki Järvinen, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 57 (2005): Issue 2