Abstract

“GNU Radio Beacon Receiver (GRBR) is a new digital receiver based on GNU Radio and USRP (Universal Software Radio Peripheral) [Yamamoto, 2008]. In this paper, the GRBR observations of large-scale wave structure (LSWS) and the subsequent development of equatorial spread F (ESF) using total electron content (TEC) derived from the ground based reception of signals from the radio beacon on board C/NOFS (Communications/Navigation Outage Forecasting System) satellite are presented. The other evidences of LSWS include the `satellite traces' observed in ionograms. These observations show that LSWS appears to play an important role in the development of ESF.

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