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.
Highlights
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
The current Brazilian Environmental Data Collection System is composed of the SCD-1, SCD-2, and CBERS-2 satellite constellations, a network of more than 700 data collection platforms (DCP) spread out in Brazil, the Reception Stations of Cuiabaand Alcantara, and the Data Collection Mission Center
We considered a nearby Data Collecting Platform number 32 590 with known latitude of 15.55293◦S and longitude of 56.06875◦W
Summary
The current Brazilian Environmental Data Collection System is composed of the SCD-1, SCD-2, and CBERS-2 satellite constellations (space segment), a network of more than 700 data collection platforms (DCP) spread out in Brazil, the Reception Stations of Cuiabaand Alcantara, and the Data Collection Mission Center. In this system, the satellite works as a message retransmitter (bent pipe transponder)
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