Titlebook: Ionospheric Radio Communications; Kristen Folkestad Book 1968 Springer Science+Business Media New York 1968 astronomy.communication.physic

清澈

Asymptomatic

Instinctive

改正

弄脏

中子

Physical Problems of Particular Relevance to Arctic Communicationsd prediction techniques are not adequate and need revision. Specific requirements and means for improving communications in the region concerned are discussed. It is stressed that the possibility for utilizing anomalous ionization structures, such as E. and the high latitude trough, for sustaining p

adj忧郁的

Some Aspects of the VLF OMEGA Navigation System as Appropriate to the Arctic Environmentwide basis. The areas of the world most likely to give the most variable position lines are those of high latitudes where ionospheric disturbances are most frequent. While ionospheric disturbances, such as those associated with solar proton events, can seriously affect navigation where highly accura

使成波状

Periodic Fading of VLF Signals Received over a Polar Path During Sunset and Sunrise cycle slippage. From the data it is concluded that by night the first and second order modes have almost exactly the same attenuation and a phase velocity difference of 0.51%, which is in agreement with Wait and Spies’ calculations for a nighttime ionosphere of height 90 km and a lower waveguide bo

Alveolar-Bone

Discussions of VLF Records Obtained During Polar Cap Absorption and Auroral Disturbancese phase of the VLF waves changes the signal will alter its frequency. In a navigation system based on VLF transmissions these changes in the propagation time must be taken into account..In this paper the influence of high latitude disturbances on VLF propagation, based on measurements carried out at

labile