GPS water vapour tomography: preliminary results from the ESCOMPTE field experiment
By Cédric Champollion, Frédéric Masson, M. Bouin, Andrea Walpersdorf, Eric Doerflinger, Olivier Bock, J. van Baelen. 2005
138 citations recorded by the source corpus.
Water vapour plays a major role in atmospheric processes but remains difficult to quantify due to its high variability in time and space and the sparse set of available measurements. The GPS has proved its capacity to measure the integrated water vapour at zenith with the same accuracy as other methods. Recent studies show that it is possible to quantify the integrated water vapour in the line of sight of the GPS satellite. These observations can be used to study the 3D heterogeneity of the troposphere using tomographic techniques. We develop three-dimensional tomographic software to model the three-dimensional distribution of the tropospheric water vapour from GPS data. First, the tomographic software is validated by simulations based on the realistic ESCOMPTE GPS network configuration. Without a priori information, the absolute value of water vapour is less resolved as opposed to relative horizontal variations. During the ESCOMPTE field experiment, a dense network of 17 dual frequency GPS receivers was operated for 2 weeks within a 20� 20-km area around Marseille (southern France). The network extends from sea level to the top of the Etoile chain (~700 m high). Optimal results have been obtained with time windows of 30-min intervals and input data evaluation every 15 min. The optimal grid for the ESCOMTE geometrical configuration has a horizontal step size of 0.058� 0.058 and 500 m vertical step size. Second, we have compared the results of real data inversions with independent observations. Three inversions have been compared
Subfields: Aerospace Engineering, Astronomy and Astrophysics, Oceanography
View Paper: https://www.semanticscholar.org/paper/9c861fc4c48aef5063cd3f82d04d693cd0ac8a93
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Aerospace Engineering
In Astronomy and Astrophysics
- J. van Baelen
- P. Di Girolamo
- R. Michael Hardesty
- David D. Turner
- Florian Zus
- Maria P. Cadeddu
- Andreas Behrendt
- Volker Wulfmeyer
In Oceanography
Citations in the corpus
- 4D GPS water vapor tomography: new parameterized approaches (2011, background): “Several studies indicate the limitations in vertical resolution (Troller 2004; Champollion et al. 2005; Bastin et al. 2007).”
- A review of the remote sensing of lower tropospheric thermodynamic profiles and its indispensable role for the understanding and the simulation of water and energy cycles (2015, background): “, 2000], in the Mediterranean [Champollion et al., 2005; Bastin et al., 2005; Brenot et al., 2014], in the Alps [Troller et al.”