Pre-processing of images from shipborne X-band wave measuring radar. Issue 22 (17th November 2017)

• Record Type: Journal Article
• Authors: Wang, Li; Liu, Xinyu; Cheng, Yunfei
• Is Part Of: International journal of remote sensing. Volume 38:Issue 22(2017)
• Page Start: 6268
• Page End: 6280
• Publication Date: 2017-11-17
• Subjects: Remote sensing -- Periodicals; Télédétection -- Périodiques; 621.3678
• DOI: 10.1080/01431161.2017.1350308
• Languages: English
• ISSNs: 0143-1161

Abstract

ABSTRACT: It is inevitable that the movement of vessels on the sea will be affected by the marine environmental extreme value parameters, such as wind, current, and wave. Driven by these factors, the vessels will produce the following movements: horizontal displacement, heave, and sway. With the shipborne X-band wave measuring radar installed on the vessel, the movements of the vessel will lead to the deviation between the actual position of the radar beam and the places we expect. It will result in an error that the intensity showed on the echo image is not the expected one. A pre-processing algorithm is developed to weaken the influence of the movements of vessel on information inversion of the ocean wave fields imaged by X-band radar. The algorithm utilizes the results of vessel motion model to correct the images from shipborne X-band wave measuring radar. Compared with simulated image sequences influenced by vessel motion, the non-direction wave height spectrum extracted from corrected image sequences matches well with that obtained from the original image sequences uninfluenced by vessel motion.