IONO project: ionospheric anomaly monitoring system to increase the availability of GBAS systems from GPS pseudodistance corrections

• Grant number: 19/16530-5
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
• Duration: June 01, 2020 - March 31, 2021
• Field of knowledge: Interdisciplinary Subjects
• Principal Investigator: Cesar Augusto Mayor Herrera
• Grantee: Cesar Augusto Mayor Herrera
• Host Company: Iacit Soluções Tecnológicas Ltda (IACIT)
• CNAE: Fabricação de equipamentos transmissores de comunicação ; Fabricação de aparelhos e equipamentos de medida, teste e controle ; Pesquisa e desenvolvimento experimental em ciências físicas e naturais
• City: São José dos Campos
• Pesquisadores principais: Paulo Rogerio Ferreira
• Associated scholarship(s): 20/11477-6 - Ionospheric anomaly monitoring system to increase the availability of GBAS systems based on pseudo-distance corrections obtained by GPS, BP.TT

Abstract

The DGNSS technique is performed from a receiver installed over a known coordinate point (called a reference station), which records the L1 pseudo-distance measurements transmitted by satellites. Since the coordinates of the satellites and the reference station are known and have the same geographic reference, the geometric pseudorange between the receiver and the satellite can be calculated accurately and thus eliminates the random errors introduced by GNSS. Aircraft approach and takeoff systems using DGNSS corrections through GBAS are currently being installed in various parts of the world, mainly at airports in the Northern Hemisphere. However, in the Southern Hemisphere, due to the characteristics of the ionosphere, GBAS systems are not yet widespread due to the large impact on GNSS signals from ionospheric anomalies, especially the bubbles, scintillations and electron density in the ionospheric layer. Thus, the accuracy required by aviation regulators to ensure flight safety is not achieved due to the continuing lack of integrity, continuity and availability of GNSS signals. Therefore, considering the importance and benefits of the use of GBAS in Brazil, is the known problem of ionospheric anomalies that occur over the country. The present research aims to develop an ionospheric anomaly monitoring system to increase the availability of pseudodistance corrections. obtained by GNSS for use in GBAS systems, as there is currently no national or international company that develops or markets such a product with its own technology. (AU)