A Robust Automatic Ionospheric O /X Mode Separation Technique for Vertical Incidence Sounders
| Autor: | T. J. Harris, L. H. Pederick |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Ionogram Computer science Mode (statistics) Polarimetry 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics 01 natural sciences Physics::Geophysics Depth sounding Physics::Space Physics 0202 electrical engineering electronic engineering information engineering General Earth and Planetary Sciences Radio frequency Electrical and Electronic Engineering Ionosphere Ionosonde Scaling 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Radio Science. 52:1534-1543 |
| ISSN: | 0048-6604 |
| DOI: | 10.1002/2017rs006279 |
| Popis: | The sounding of the ionosphere by a vertical incidence sounder (VIS) is the oldest and most common technique for determining the state of the ionosphere. The automatic extraction of relevant ionospheric parameters from the ionogram image, referred to as scaling, is important for the effective utilization of data from large ionospheric sounder networks. Due to the Earth's magnetic field, the ionosphere is birefringent at radio frequencies, so a VIS will typically see two distinct returns for each frequency. For the automatic scaling of ionograms, it is highly desirable to be able to separate the two modes. Defence Science and Technology Group has developed a new VIS solution which is based on direct digital receiver technology and includes an algorithm to separate the O and X modes. This algorithm can provide high-quality separation even in difficult ionospheric conditions. In this paper we describe the algorithm and demonstrate its consistency and reliability in successfully separating 99.4% of the ionograms during a 27 day experimental campaign under sometimes demanding ionospheric conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text