Locating the Source of Long-Distance Radio Distress Signals from the Southern Ocean
Abstract
This report summarizes a feasibility study and strategy appropriate to search and rescue operations for ships or aircraft in distress in the Southern Ocean. The use of high frequency ionospherically-propagated radio transmissions is justified. Measurement of the direction of arrival of a radio signal facilitates ray-tracing through the ionosphere Characteristics of the F2 region mid-latitude ionization trough are considered in detail. Because the trough is displaced towards Australia, its position must be known as near as practicable in real time for sufficiently accurate ray-tracing to be performed quickly enough after receipt of a distress signal. The differential Doppler technique using e.g. 150 and 400 MHz transmissions from NAVSAT (NNSS) satellites is recommended in locating the trough position.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1988
- Accession Number
- ADA198239
Entities
People
- G. L. Goodwin