Evaluation of Tropospheric and Ionospheric Effects on the Geographic Localization of Data Collection Platforms

Celestino, C. C.; Sousa, C. T.; Yamaguti, W.; Kuga, H. K.

doi:https://doi.org/10.1155/2007/32514

Mathematical Problems in Engineering

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Dynamics and Control in Sciences and Engineering

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Research Article | Open Access

Volume 2007 | Article ID 032514 | https://doi.org/10.1155/2007/32514

Evaluation of Tropospheric and Ionospheric Effects on the Geographic Localization of Data Collection Platforms

C. C. Celestino,¹C. T. Sousa,³W. Yamaguti,¹and H. K. Kuga²

Academic Editor: José Manoel Balthazar

Received29 Sept 2006

Accepted23 Apr 2007

Published12 Jul 2007

Abstract

The Brazilian National Institute for Space Research (INPE) is operating the Brazilian Environmental Data Collection System that currently amounts to a user community of around 100 organizations and more than 700 data collection platforms installed in Brazil. This system uses the SCD-1, SCD-2, and CBERS-2 low Earth orbit satellites to accomplish the data collection services. The main system applications are hydrology, meteorology, oceanography, water quality, and others. One of the functionalities offered by this system is the geographic localization of the data collection platforms by using Doppler shifts and a batch estimator based on least-squares technique. There is a growing demand to improve the quality of the geographical location of data collection platforms for animal tracking. This work presents an evaluation of the ionospheric and tropospheric effects on the Brazilian Environmental Data Collection System transmitter geographic location. Some models of the ionosphere and troposphere are presented to simulate their impacts and to evaluate performance of the platform location algorithm. The results of the Doppler shift measurements, using the SCD-2 satellite and the data collection platform (DCP) located in Cuiabá town, are presented and discussed.

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Copyright

Copyright © 2007 C. C. Celestino et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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