دانلود کتاب Ionospheric Radio Communications

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Front Matter....Pages i-xi
Opening Speech....Pages 1-6
Front Matter....Pages 7-7
The General Pattern of Auroral Particle Precipitation and Its Implications for High Latitude Communication Systems....Pages 9-32
Characteristics of Polar Cap Absorption....Pages 33-45
The Ionization Maximum in Polar Latitudes....Pages 46-57
Normal and Abnormal Absorption at High Latitudes....Pages 58-62
Collision Frequency in the High Latitude D-Region....Pages 63-72
Electron Density Observations During Auroral Absorption Related to Radio Wave Communication Problems....Pages 73-80
Physical Problems of Particular Relevance to Arctic Communications....Pages 81-86
Front Matter....Pages 89-89
Some Aspects of the VLF OMEGA Navigation System as Appropriate to the Arctic Environment....Pages 91-107
Periodic Fading of VLF Signals Received over a Polar Path During Sunset and Sunrise....Pages 108-116
Discussions of VLF Records Obtained During Polar Cap Absorption and Auroral Disturbances....Pages 117-138
Front Matter....Pages 141-141
Survey of Ionospheric and Meteor Scatter Communications....Pages 143-154
Simultaneous VHF Riometer and Forward-Scatter Observations of the Disturbed Lower Ionosphere....Pages 155-164
Meteor Burst Communications in the Arctic....Pages 165-173
VHF Bistatic Auroral Backscatter Communication....Pages 174-205
Front Matter....Pages 207-207
Survey of the Effects of Ionospheric Propagation on HF Communication Systems....Pages 209-224
HF Spatial and Temporal Propagation Characteristics and Sounding Assisted Communications....Pages 225-241
The Propagation of High Frequency Waves on the Winnipeg-Resolute Bay Oblique Sounder Circuit....Pages 242-259
Royal Air Force Coastal Command Maritime Air/Ground Communications to and from Auroral Regions....Pages 260-262
Developments of HF Predictions for the Arctic....Pages 263-271
Front Matter....Pages 207-207
Comparison of Propagation Predictions and Measured Performance for Two Paths over the Norwegian Sea....Pages 272-278
Results from Stepped Frequency Oblique Soundings at High Latitudes....Pages 279-288
The Significance of Sporadic E Propagation in Determining the MUF....Pages 289-293
Morphology of Fading of Radio Waves Traversing the Auroral Ionosphere....Pages 294-315
Front Matter....Pages 319-319
Modeling Communication Systems....Pages 321-340
Adaptive Receivers for Multipath Channels....Pages 341-358
The Chec Sounding System....Pages 359-369
The Curts Concept and Current Status of Development....Pages 370-379
Notes on a Multi-Mode Communication System....Pages 380-381
A Note Regarding the Performance of Various Communications Systems in a Noisy Background....Pages 382-383
Summary of Techniques Available for Overcoming Physical Problems of High-Latitude Communications....Pages 384-389
Front Matter....Pages 393-393
Existing Communications Facilities and User Problems in the Canadian Arctic....Pages 395-413
Some Experiences with Military Communications in the Canadian Arctic....Pages 414-421
Survey of the User Problems and Existing Communication Facilities in the Norwegian Arctic....Pages 422-429
Front Matter....Pages 431-431
Summary of Sessions....Pages 433-438
Relationship between the User, Systems Designer, & Radio Physicist....Pages 439-441
Users Viewpoint Contribution to the Summary Panel Discussion....Pages 442-447
Physicist’s Contribution to Panel Discussion....Pages 448-449
Bridging the Gap between Physicist, Engineer and the User and the Needs for the Future....Pages 450-453
Back Matter....Pages 455-468