sky wave
4.The results of receiving the BPL ground-wave and sky-wave signals from various Places are different. For the Places that the noise field strength of about 50 dB, the BPL ground-wave strength lower than 30dB, and that of the first-hop sky-wave of 50dB——that is the case of Guangzhou monitoring station, we can recognize the cycle of groung-waves by the method of using the sky-waves.
5.Tilemeasurement made at Qingdao during 14, Aug- 25, Sept , 1991 for Loran-C signals from M station and Y stationin the Northwest Pacific Chain shows that tile mean difference of lowest propagation time-delay between Loran-Csky-wave and ground-wave in day time is 29. 8μs, and the absolute propagation time-detay of the sky- wave is7924. 27μs.
6.By using optical cable communication methods, which have advantages of great information transmission capacity, rapid velocity, wide frequency band, strong anti-jamming capability, low circuitry loss and easy construction, modern sky-wave over-the-horizontal radar can achieve information transmission and system control of full coherent radar, which has excellent abilities of security, stabilization, anti-jamming and anti-destruction.
8.Second Wave propagandists regularly picture them as naïve, unconcerned with dollar realities,and bedazzled by blue-sky technology.
9.In all clusters, and the construction of Buyun door, the sky Court, Arena Lingyun, the outer cloud incense, flowers Hong Kong Xiaolan, everyone rooms, two to booths and hope magpie Pavilion, Jin Lin plays wave, the lotus pool, vast booths, the old trail, and other scenic 23 points, which Buyun door, the sky Court, such as the Tour Mill as if into the sky, the clouds have a tendency to smug like entering Wonderland; straight sky Court, as if into paradise, a sense of exposure from Habitat.
10.A Methob for Recoghization of the Cycle of BPL Long-wave Timing Signals—Accurate Determination of the Cycles of Ground—waves dy Sky—waves
