Nondirectional beacons: Coverage limitations due to night effect
Abstract
The distances at which the ground wave component of the field of a nondirectional beacon is 10dB stronger than the sky wave component for 90 percent of the time were computed using CCIR propagation prediction techniques. The distances are presented for frequencies from 190 kHz to 1000 kHz and for ground conductivities from 0.00025 mho/m to mho/m.
- Publication:
-
Final Report Institute for Telecommunication Sciences
- Pub Date:
- July 1982
- Bibcode:
- 1982its..rept.....B
- Keywords:
-
- Ground Wave Propagation;
- Nightglow;
- Radio Direction Finders;
- Sky Waves;
- Prediction Analysis Techniques;
- Radio Frequencies;
- Tables (Data);
- Communications and Radar