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Sea Echoes for Airborne HF/VHF Radar: Mathematical Model and Simulation
- Source :
- Remote Sensing, Volume 12, Issue 22, Remote Sensing, Vol 12, Iss 3755, p 3755 (2020)
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- Currently, shore-based HF radars are widely used for coastal observations, and airborne radars are utilized for monitoring the ocean with a relatively large coverage offshore. In order to take the advantage of airborne radars, the theoretical mechanism of airborne HF/VHF radar for ocean surface observation has been studied in this paper. First, we describe the ocean surface wave height with the linear and nonlinear parts in a reasonable mathematical form and adopt the small perturbation method (SPM) to compute the HF/VHF radio scattered field induced by the sea surface. Second, the normalized radar cross section (NRCS) of the ocean surface is derived by tackling the field scattered from the random sea as a stochastic process. Third, the NRCS is simulated using the SPM under different sea states, at various radar operating frequencies and incident angles, and then the influences of these factors on radar sea echoes are investigated. At last, a comparison of NRCS using the SPM and the generalized function method (GFM) is done and analyzed. The mathematical model links the sea echoes and the ocean wave height spectrum, and it also offers a theoretical basis for designing a potential airborne HF/VHF radar for ocean surface remote sensing.
- Subjects :
- Radar cross-section
010504 meteorology & atmospheric sciences
Field (physics)
Science
0211 other engineering and technologies
02 engineering and technology
01 natural sciences
law.invention
Physics::Geophysics
law
Wind wave
radar cross section
Radar
Physics::Atmospheric and Oceanic Physics
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Remote sensing
Shore
geography
geography.geographical_feature_category
Stochastic process
airborne HF/VHF radar
Normalized radar cross section
General Earth and Planetary Sciences
Submarine pipeline
sea echo
Geology
mathematical model
Subjects
Details
- Language :
- English
- ISSN :
- 20724292
- Database :
- OpenAIRE
- Journal :
- Remote Sensing
- Accession number :
- edsair.doi.dedup.....3aa0a760802841c9fb22f5c4c9dcfc4b
- Full Text :
- https://doi.org/10.3390/rs12223755