HF (High Frequency) Over-the-Horizon Mapping of the Greenland Icecap,
Abstract
Continuous observation of the Greenland area using HF over-the-horizon Sounding system in the North Atlantic region has produced a data base for the analysis of backscatter reflectivity at high frequencies (6-30 MHz) from the Greenland Icecap. The proximity of these observations to the auroral region generated the additional complication of excess losses due to D-region absorption. This statistical data base has produced a mapping of th icecap thickness, with backscatter reflectivities that vary from -5 dB to -15 dB below the signals returned from the surrounding sea water. A statistically meaningful daytime absorption of the order of 5 dB was measured over Greenland. At night the significantly increased auroral absorption and atmospheric noise, reduced the system's sensitivity, making mapping impossible. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1983
- Accession Number
- ADP002726
Entities
People
- G. S. Sales