Open Access

The impact of atmospheric mountain lee waves on systematic geodetic errors observed using the Global Positioning System

  • Seiichi Shimada1Email author,
  • Hiromu Seko2,
  • Hajime Nakamura2,
  • Kazumasa Aonashi2 and
  • Thomas A. Herring3
Earth, Planets and Space201454:BF03352433

https://doi.org/10.1186/BF03352433

Received: 22 November 2001

Accepted: 4 February 2002

Published: 20 June 2014

Abstract

Atmospheric mountain lee waves excited by a strong westerly wind ahead of approaching cold front are shown to have significant effect on GPS positioning. Before the approach of the cold front significant atmospheric gradients caused by the inhomogeneous water vapor are detected at the sites along the east coast of the Izu Peninsula because of a wet atmosphere to the west of these sites. In contrast, the island site 6 km east of the coast detects a strong gradient with the opposite sense. The Geostationary Meteorological Satellite cloud shows rows of the clouds due to mountain lee waves consistent with the GPS measurements. A numerical simulation explains the mountain lee waves. The atmospheric perturbations induce large systematic errors in the estimates of horizontal positions of the sites in the region.