Signal structure during diffuse reflection from the ionosphere
Abstract
The results of an experimental study on the diffuse structure of a signal with 10 microsec resolution during vertical and oblique ionospheric sounding with decametric waves are presented. The diffuse signal (spread F) usually consisted of several discrete pulses with a marked maximum. The time duration of the diffuse group of pulses amounted to 40-80 microsec in vertical sounding and 100-150 microsec in oblique sounding. In oblique sounding, and also in vertical sounding at frequencies above .8 times the critical frequency, the various pulses of the diffuse signal fluctuated in amplitude and delay time. In vertical sounding at frequencies below .8 times the critical frequency, the pulses fluctuated but had stable time shifts during the course of two-minute observations. The role of various mechanisms for the formation of diffuse reflections is discussed.
- Publication:
-
Radiofizika
- Pub Date:
- 1975
- Bibcode:
- 1975MSSV...18.1355N
- Keywords:
-
- Decametric Waves;
- Diffuse Radiation;
- Ionospheric Propagation;
- Signal Reflection;
- Spread F;
- Critical Frequencies;
- Ionospheric Sounding;
- Pulsed Radiation;
- Radio Echoes;
- Communications and Radar