Ship-to-Ship Tactical (Groundwave Range) HF Communications. (Performance Predictions in Graphical Form)
NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA
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The document addresses ship-to-ship tactical hf communications groundwave distances over seawater. It provides performance predictions in ready-to-use graphical form, and discusses transmission system factors that influence system performance. It suggests a deviation from the traditional procedure of tactical hf frequency assignment static assignment in the 2-6-MHz band to a more dynamic assignment procedure by making assignments based upon the tactical situation and performance predictions covering the entire hf band. The predictions show that under certain conditions expected hf groundwave ranges will be greater in the 10-20-MHz band than at 2 MHz. Further, they indicate that atmospheric noise has considerable influence over performance and that shipboard hf antenna system improvement can provide significant improvement in system performance.
- Radio Communications