Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year 5.689
  • CiteScore value: 5.44 CiteScore 5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H index value: 161 Scimago H index 161
Volume 11, issue 13 | Copyright
Atmos. Chem. Phys., 11, 6687-6699, 2011
https://doi.org/10.5194/acp-11-6687-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 13 Jul 2011

Research article | 13 Jul 2011

First results from the GPS atmosphere sounding experiment TOR aboard the TerraSAR-X satellite

G. Beyerle1, L. Grunwaldt1, S. Heise1, W. Köhler1, R. König1, G. Michalak1, M. Rothacher2, T. Schmidt1, J. Wickert1, B. D. Tapley3, and B. Giesinger4 G. Beyerle et al.
  • 1GFZ German Research Centre for Geosciences, Potsdam, Germany
  • 2Swiss Federal Institute of Technology, Zurich, Switzerland
  • 3Center for Space Research, University of Texas (UT-CSR), Austin, TX, USA
  • 4Broad Reach Engineering, Tempe, AZ, USA

Abstract. GPS radio occultation events observed between 24 July and 17 November 2008 by the IGOR occultation receiver aboard the TerraSAR-X satellite are processed and analyzed. The comparison of 15 327 refractivity profiles with collocated ECMWF data yield a mean bias between zero and −0.30 % at altitudes between 5 and 30 km. Standard deviations decrease from about 1.4 % at 5 km to about 0.6 % at 10 km altitude, however, increase significantly in the upper stratosphere. At low latitudes mean biases and standard deviations are larger, in particular in the lower troposphere. The results are consistent with 15 159 refractivity observations collected during the same time period by the BlackJack receiver aboard GRACE-A and processed by GFZ's operational processing system. The main difference between the two occultation instruments is the implementation of open-loop signal tracking in the IGOR (TerraSAR-X) receiver which improves the tropospheric penetration depth in terms of ray height by about 2 km compared to the conventional closed-loop data acquired by BlackJack (GRACE-A).

Download & links
Publications Copernicus
Download
Citation
Share