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Low-cost Ionospheric scintillation detector using software-based GNSS receiver

In this study, we investigate in the use of software-based GNSS receiver to detect ionospheric scintillation in Vietnam. Ionospheric scintillation is well-known for its bad effect on the precision of GNSS receivers. Vietnam locates at a low-lattitude region which is one of the most-affected region if any scintillation occurs. Therefore, it is important to be able detect and store the data of the receiver during scintillation periods for later analysis and mitigation. | Journal of Science & Technology 123 (2017) 065-069 Low-cost Ionospheric Scintillation Detector using Software-based GNSS Receiver La The Vinh Hanoi University of Science and Technology, No. 1, Dai Co Viet, Hai Ba Trung, Hanoi, Viet Nam Received: May 19, 2016; Accepted: November 03, 2017 Abstract In this study, we investigate in the use of software-based GNSS receiver to detect ionospheric scintillation in Vietnam. Ionospheric scintillation is well-known for its bad effect on the precision of GNSS receivers. Vietnam locates at a low-lattitude region which is one of the most-affected region if any scintillation occurs. Therefore, it is important to be able detect and store the data of the receiver during scintillation periods for later analysis and mitigation. However, professional ionospheric scintillation monitoring machin are often expensive and not easy to access. The main goal of this work is to propose a low-cost method to detect the scintillation and to save its data for later use by utilizing a software-based GNSS receiver. Keywords: Ionosphere, Scintillation, GNSS, GPS 1. Introduction * Motivated by the need of a continuosly operating GNSS raw data logger for ionospheric scintillation monitoing, we propose in this work a monitoring systemwhich is capable of: (1) computing scintillation index in realtime, (2) activating data logger if and only if there is a scintillation (the index is over a predefined threshold), and (3) capturing raw GNSS data even if a strong scintialltion disabling the receiver from satellite accquision and tracking. In Global Navigation Satellite Systems (GNSS), it is well-known that the ionosphere layer strongly influences on the precision of the GNSS receivers, especially at low-lattitude regions due to the high value of the total electron content (TEC). In particular, once a strong ionosphere scintillation happens, it may totally disrupt GNSS signal’s phase and amplitude making the receiver unable to perform satellite aquisition