Ánalise da qualidade de recepção de dados digitais por satélite geoestacionário em banda Ku em região mesotérmica úmida no Brasil por series temporais

Abstract

The objective of the present study is to carry out a quantitative investigation into the statistical quality of a digital transmission made by a geostationary satellite in the lower portion of the microwave K band, characterized by frequencies between 10.2 and 11.5 GHz. To establish quality control of data retrieval, signal level data was collected in humid mesothermal region in the central region of the extreme south of Brazil at each ten-second time interval, from October 16, 2019 to September 8, 2020, coinciding with the beginning of a minimum of heliomagnetic activity. Throughout the text, an extensive and complete analysis of all possible factors of degradation of the statistical quality of the digital data flow and we conclude that extratropical cyclones on the southern Brazilian coast, light to moderate rains, interference with the alignment of the solar disk with the satellite’s line of sight are not factors that alter the quality of the data for purposes practical. Seasonal signal level variability with the day-night cycle was discovered and the amplitude of the received signal is smaller during solar transit, probably due to atmospheric heating that produces complex solar phenomena. absorption of microwaves in this frequency range. These cycles cannot be interpreted by ARMS or ARIMA Box-Jenkins models efficiently, with the Holt-Winters model being the most suitable for inferring the observed properties of Frequency. The quality of the system developed for detecting digital satellite signals is also assessed using statistical methods. It is believed that the results discussed in this work can be applied to future studies on transmission quality on other frequencies. of digital internet via satellite such as 5G (above 26 GHz) and 6G (7-20 GHz) and loss of quality below 12 GHz available for Brazilian territory is unlikely to happen.