A high resolution ionosonde. I - Technique and analysis methods. II - Equipment and preliminary results
Abstract
It is shown that by measuring the phase path of an ionospheric echo at a number of equally spaced frequencies it is possible to derive with a high degree of accuracy the group path of the echo. By using the discrete Fourier transform for analyzing the data recorded by a phase path ionosonde, the group path can be determined with an accuracy of about 250 m if a frequency range of about 300 kHz is used. A system capable of obtaining swept frequency phase path measurements is described, and some preliminary results obtained with it in studying the fine structure of the E-region, sporadic E-layers, and the F-region are examined.
- Publication:
-
Journal of Atmospheric and Terrestrial Physics
- Pub Date:
- October 1976
- DOI:
- 10.1016/0021-9169(76)90076-3
- Bibcode:
- 1976JATP...38..935H
- Keywords:
-
- Echo Sounding;
- High Resolution;
- Ionosondes;
- Ionospheric Sounding;
- Signal Measurement;
- Signal Processing;
- Data Recording;
- Data Reduction;
- Doppler Effect;
- Error Signals;
- F Region;
- Frequency Stability;
- Instrument Errors;
- Signal Reception;
- Signal To Noise Ratios;
- Sporadic E Layer