On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding
Orbital radars are used to monitor the state of the sea ice in the Arctic and Antarctic. The backscattering radar cross section (RCS) is used to determine the type of scattering surface. The power of the reflected signal depends on many factors, so the problem of separating sea ice and sea waves is...
Published in: | Remote Sensing |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2022
|
Subjects: | |
Online Access: | https://doi.org/10.3390/rs14194937 https://doaj.org/article/a734deb4179f436f8bbf54d5f8df8030 |
id |
ftdoajarticles:oai:doaj.org/article:a734deb4179f436f8bbf54d5f8df8030 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:a734deb4179f436f8bbf54d5f8df8030 2023-05-15T13:36:12+02:00 On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding Vladimir Karaev Yury Titchenko Maria Panfilova Kiril Ponur Maria Ryabkova Eugeny Meshkov Dmitry Kovaldov 2022-10-01T00:00:00Z https://doi.org/10.3390/rs14194937 https://doaj.org/article/a734deb4179f436f8bbf54d5f8df8030 EN eng MDPI AG https://www.mdpi.com/2072-4292/14/19/4937 https://doaj.org/toc/2072-4292 doi:10.3390/rs14194937 2072-4292 https://doaj.org/article/a734deb4179f436f8bbf54d5f8df8030 Remote Sensing, Vol 14, Iss 4937, p 4937 (2022) Doppler spectrum of the backscattered radar signal sea ice sea waves knife-like antenna beam kurtosis coefficient retrieval algorithm Science Q article 2022 ftdoajarticles https://doi.org/10.3390/rs14194937 2022-12-30T23:09:32Z Orbital radars are used to monitor the state of the sea ice in the Arctic and Antarctic. The backscattering radar cross section (RCS) is used to determine the type of scattering surface. The power of the reflected signal depends on many factors, so the problem of separating sea ice and sea waves is not always unambiguous. Previous research has shown that microwave Doppler radar installed on aircrafts can be used to determine the boundary of sea ice. The width of the Doppler spectrum for wide or knife-like antenna beam depends on the statistical parameters of the reflecting surface, so sea ice and sea waves are easily separated. However, when installing a Doppler radar on a satellite, the spatial resolution becomes extremely low. In this research, we discuss the possibility of improving the spatial resolution by dividing the antenna footprint into elementary scattering cells. To do this, it is proposed to use the original incoherent synthesis procedure, which allows one to determine the dependence of the RCS on the incidence angle for an elementary scattering cell. Numerical modeling was performed and processing of model data confirmed that sea ice and sea waves are separated. The coefficient of kurtosis was used as a criterion in the algorithm. In addition, for sea waves, it is possible to determine the mean square slopes ( mss ) of large-scale waves, compared to the electromagnetic wavelength of sea waves along the sounding direction. Article in Journal/Newspaper Antarc* Antarctic Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Arctic Remote Sensing 14 19 4937 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Doppler spectrum of the backscattered radar signal sea ice sea waves knife-like antenna beam kurtosis coefficient retrieval algorithm Science Q |
spellingShingle |
Doppler spectrum of the backscattered radar signal sea ice sea waves knife-like antenna beam kurtosis coefficient retrieval algorithm Science Q Vladimir Karaev Yury Titchenko Maria Panfilova Kiril Ponur Maria Ryabkova Eugeny Meshkov Dmitry Kovaldov On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding |
topic_facet |
Doppler spectrum of the backscattered radar signal sea ice sea waves knife-like antenna beam kurtosis coefficient retrieval algorithm Science Q |
description |
Orbital radars are used to monitor the state of the sea ice in the Arctic and Antarctic. The backscattering radar cross section (RCS) is used to determine the type of scattering surface. The power of the reflected signal depends on many factors, so the problem of separating sea ice and sea waves is not always unambiguous. Previous research has shown that microwave Doppler radar installed on aircrafts can be used to determine the boundary of sea ice. The width of the Doppler spectrum for wide or knife-like antenna beam depends on the statistical parameters of the reflecting surface, so sea ice and sea waves are easily separated. However, when installing a Doppler radar on a satellite, the spatial resolution becomes extremely low. In this research, we discuss the possibility of improving the spatial resolution by dividing the antenna footprint into elementary scattering cells. To do this, it is proposed to use the original incoherent synthesis procedure, which allows one to determine the dependence of the RCS on the incidence angle for an elementary scattering cell. Numerical modeling was performed and processing of model data confirmed that sea ice and sea waves are separated. The coefficient of kurtosis was used as a criterion in the algorithm. In addition, for sea waves, it is possible to determine the mean square slopes ( mss ) of large-scale waves, compared to the electromagnetic wavelength of sea waves along the sounding direction. |
format |
Article in Journal/Newspaper |
author |
Vladimir Karaev Yury Titchenko Maria Panfilova Kiril Ponur Maria Ryabkova Eugeny Meshkov Dmitry Kovaldov |
author_facet |
Vladimir Karaev Yury Titchenko Maria Panfilova Kiril Ponur Maria Ryabkova Eugeny Meshkov Dmitry Kovaldov |
author_sort |
Vladimir Karaev |
title |
On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding |
title_short |
On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding |
title_full |
On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding |
title_fullStr |
On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding |
title_full_unstemmed |
On the Problem of the Sea Ice Detection by Orbital Microwave Doppler Radar at the Nadir Sounding |
title_sort |
on the problem of the sea ice detection by orbital microwave doppler radar at the nadir sounding |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/rs14194937 https://doaj.org/article/a734deb4179f436f8bbf54d5f8df8030 |
geographic |
Antarctic Arctic |
geographic_facet |
Antarctic Arctic |
genre |
Antarc* Antarctic Arctic Sea ice |
genre_facet |
Antarc* Antarctic Arctic Sea ice |
op_source |
Remote Sensing, Vol 14, Iss 4937, p 4937 (2022) |
op_relation |
https://www.mdpi.com/2072-4292/14/19/4937 https://doaj.org/toc/2072-4292 doi:10.3390/rs14194937 2072-4292 https://doaj.org/article/a734deb4179f436f8bbf54d5f8df8030 |
op_doi |
https://doi.org/10.3390/rs14194937 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
19 |
container_start_page |
4937 |
_version_ |
1766075426692661248 |