On Sea Ice Measurement by a C-Band Scatterometer at VV Polarization: Methodology Optimization Based on Computer Simulations

Nekrasov, Alexey; Khachaturian, Alena B.; Abramov, Evgeny; Markelov, Oleg A.; Bogachev, Mikhail I.

doi:10.3390/rs11212518

Cited by 4 publications

(14 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Very recently, we have proposed the following sea ice/water discrimination method in [25]. The method uses the statistical distance of measured NRCS values to GMFs of the sea ice or water when the sea ice S ice and water S water summation results, which are compared as follows to decide whether the sea ice or water is observed: are the closest values of the sea ice and water GMFs, respectively, corresponding to the measured i-NRCS value.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, we have proposed a method for the discrimination of sea ice and water by the current spacecraft scatterometers [25]. The method is based on the criterion of the statistical distance of measured NRCSs to the sea ice GMF and the water GMF.…”

Section: Introductionmentioning

confidence: 99%

“…The method is based on the criterion of the statistical distance of measured NRCSs to the sea ice GMF and the water GMF. The method has been implemented for the classical three-beam and for the hypothetical five-beam C-band scatterometers operated only with the VV polarization for all antennas [25]. In this connection, here we focus on the extension of that method to the cases of the joint VV and HH polarizations for the SCA and some other possible fixed fan-beam scatterometers.…”

Section: Introductionmentioning

confidence: 99%

“…In this connection, here we focus on the extension of that method to the cases of the joint VV and HH polarizations for the SCA and some other possible fixed fan-beam scatterometers. Unlike consideration of the sea ice/water discrimination only at the VV polarization in [25], we are considering the sea ice/water discrimination at the VV polarization in conjunction with the additional HH polarization for various combinations of scatterometer beams in this paper.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Towards the Sea Ice and Wind Measurement by a C-Band Scatterometer at Dual VV/HH Polarization: A Prospective Appraisal

et al. 2020

Self Cite

View full text Add to dashboard Cite

Following the mission science plan of EPS/Metop-SG C-band scatterometer for 2023–2044, we consider the potential application of the sea ice/water discrimination method based on the minimum statistical distance of the measured normalized radar cross sections (NRCS) to the geophysical model functions (GMF) of the sea ice and water, respectively. The application of the method is considered for the classical spacecraft scatterometer geometry with three fixed fan-beam antennas and the hypothetical prospective scatterometer geometry with the five fixed fan-beam antennas. Joint vertical (VV) and horizontal (HH) transmit and receive polarization are considered for the spaceborne scatterometer geometries. We show explicitly that the hypothetical five fixed fan-beam antenna geometry combined with the dual VV and HH polarization for all antennas provides better estimates of the sea wind speed and direction as well as sea ice/water discrimination during single spacecraft pass. The sea ice/water discrimination algorithms developed for each scatterometer geometry and dual VV/HH polarization are presented. The obtained results can be used to optimize the design of new spaceborne scatterometers and will be beneficial to the forthcoming satellite missions.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Towards the Sea Ice and Wind Measurement by a C-Band Scatterometer at Dual VV/HH Polarization: A Prospective Appraisal

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recently, we have considered the sea ice/water discrimination method (1) with regard to its adaptation to the typical three fixed fan-beam geometry of a spaceborne scatterometer ASCAT [18]. For that purpose, the water GMF has been represented by CMOD7, and the sea ice GMF has been represented in the azimuthally isotropic form of [17], [20]…”

mentioning

confidence: 99%

On Sea Ice/Water Discrimination by Airborne Weather Radar

et al. 2020

Self Cite

View full text Add to dashboard Cite

We consider a conceptual approach for the applicability of airborne weather radar for the sea ice/water discrimination and estimation of the sea ice age. The sea ice/water discrimination method suited for the airborne weather radar utilization is based on finding the minimum statistical distance of the measured normalized radar cross sections within a wide azimuth sector to the geophysical model functions of the sea ice and water, respectively. The sea ice age classification is based on the comparison of the normalized radar cross section value at a given incidence angle to the lower normalized radar cross section boundaries for the first-, second-, and multi-year ice. Implementation of the proposed methodology is considered for the C-band airborne weather radar operated in the ground mapping mode as a scatterometer scanning in a wide azimuth sector up to ±100°. We show explicitly that the proposed approach provides the enhancement of the conventional airborne weather radar functionality for the sea ice/water discrimination and sea ice age estimation either using stand-alone or joint measurements.

show abstract

Using Semicircular Sampling to Increase Sea Water/Ice Discrimination Altitude

Nekrasov,

Khachaturian,

Fidge

2024

Emerg Sci J

View full text Add to dashboard Cite

The rapid development of aircraft and unmanned aerial vehicles (UAV) increases their use, including in polar areas, which are characterized by their remoteness and rather harsh conditions. The dominant trends in airborne radar development are expanding their functionality and increasing the altitude of their applicability. Our study focuses on the functionality enhancement of airborne high-altitude conical scanning radars currently used for circular clouds and precipitation observations as well as for sea wind measurements. Recently, we showed how a semicircular observation scheme, instead of a circular one, can double the maximum applicable altitude of sea wind measurements made with such radars. Here we apply this approach to show how an airborne high-altitude conical scanning radar’s functionality can also be expanded for sea water/ice discrimination within a semicircular observation scheme, again doubling the maximum discrimination altitude compared to circular observations. The discrimination is performed in scatterometer mode using the minimum statistical distance of the measured normalized radar cross sections (NRCSs) to the geophysical model functions (GMFs) of the sea water and ice underlying surfaces. However, as no sea ice GMF is available for the considered horizontal transmit and receive polarization at the Ku band, we instead used a substitute sea ice GMF having the same azimuth isotropic property setting for its NRCSs as the averaged value of the measured azimuth NRCSs within the semicircular observations scheme. Our analysis found that incidence angles of 30°, 45°, and 60° are well suited to our sea water/ice discrimination method, and that incidence angles higher than 30° are preferable as they provide a higher difference in the statistical distance of the measured NRCSs to the sea ice and water GMFs, whereas an incidence angle of 30° provides the highest applicable altitude for sea water/ice discrimination and wind retrieval. We also demonstrated the ability of the sea water/ice discrimination procedure’s implementation for any airborne wind scatterometer or multimode radar operated in scatterometer mode over freezing seas to avoid entirely erroneous sea wind measurement results when a sea ice surface is observed. The obtained results can also be used for enhancing aircraft and UAV radars and for developing new remote sensing systems. Doi: 10.28991/ESJ-2024-08-02-07 Full Text: PDF

show abstract

On Sea Ice Measurement by a C-Band Scatterometer at VV Polarization: Methodology Optimization Based on Computer Simulations

Cited by 4 publications

References 29 publications

Towards the Sea Ice and Wind Measurement by a C-Band Scatterometer at Dual VV/HH Polarization: A Prospective Appraisal

Towards the Sea Ice and Wind Measurement by a C-Band Scatterometer at Dual VV/HH Polarization: A Prospective Appraisal

On Sea Ice/Water Discrimination by Airborne Weather Radar

Using Semicircular Sampling to Increase Sea Water/Ice Discrimination Altitude

Contact Info

Product

Resources

About