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Main Title: Sea Ice Detection Based on Differential Delay-Doppler Maps from UK TechDemoSat-1
Author(s): Zhu, Yongchao
Yu, Kegen
Zou, Jingui
Wickert, Jens
Type: Article
Language Code: en
Abstract: Global Navigation Satellite System (GNSS) signals can be exploited to remotely sense atmosphere and land and ocean surface to retrieve a range of geophysical parameters. This paper proposes two new methods, termed as power-summation of differential Delay-Doppler Maps (PS-D) and pixel-number of differential Delay-Doppler Maps (PN-D), to distinguish between sea ice and sea water using differential Delay-Doppler Maps (dDDMs). PS-D and PN-D make use of power-summation and pixel-number of dDDMs, respectively, to measure the degree of difference between two DDMs so as to determine the transition state (water-water, water-ice, ice-ice and ice-water) and hence ice and water are detected. Moreover, an adaptive incoherent averaging of DDMs is employed to improve the computational efficiency. A large number of DDMs recorded by UK TechDemoSat-1 (TDS-1) over the Arctic region are used to test the proposed sea ice detection methods. Through evaluating against ground-truth measurements from the Ocean Sea Ice SAF, the proposed PS-D and PN-D methods achieve a probability of detection of 99.72% and 99.69% respectively, while the probability of false detection is 0.28% and 0.31% respectively.
Issue Date: 12-Jul-2017
Date Available: 16-Sep-2019
DDC Class: 550 Geowissenschaften
620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): sea ice
Delay-Doppler Map
differential DDM
UK TechDemoSat-1
Journal Title: Sensors
Publisher: MDPI
Publisher Place: Basel
Volume: 17
Issue: 7
Article Number: 1614
Publisher DOI: 10.3390/s17071614
EISSN: 1424-8220
Appears in Collections:FG GNSS-Fernerkundung, Navigation und Positionierung » Publications

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