1. Data Structures and Algorithms;Aho,1987
2. A low power vertical incidence ionosonde;Barry;IEEE Trans. Geosci. Electron.,1971
3. Radar Technology Encyclopedia,1998
4. Description of ionospheric disturbances observed by vertical ionospheric sounding at 3MHz;Baskaradas;Ann. Geophys.,2014
5. Ionospheric Doppler measurements by means of HF-radar techniques;Bianchi;Ann. Geophys.,2005