Comparison of IONCAP Predictions with AN/TRQ-35(V) Oblique-Incidence Sounder Measurements for a One-Month Conus Test During July and August 1982

The US Army Special Forces conducted a one-month test of high frequency (HF) propagation predictability during July and August 1982. One site was located at Ft. Bragg, NC, and it received transmissions from sounders located at Ft. Knox, KY (696 km), Ft. Leavenworth, KS (1439 km), and Ft. Lewis, WA (3830 km). AN/TRQ-35(V) oblique-incidence ionospheric sounders were used on each of the test paths at least once each hour for each of the 29 test days. Frequency reliability tables (FRTs) were generated two months prior to the test by the US Army Communications-Electronics Engineering Installation Agency (USACEEIA), Ft. Huachuca, AZ using the Ionospheric Communications Analysis and Prediction (IONCAP) program. In this paper, the IONCAP predictions are compared with the sounder measurements.