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Real-Time Sea Ice Detection from Coastal Radars

Real-Time Sea Ice Detection from Coastal Radars. 3 rd Ice Analyst Workshop Tuomas Niskanen 14-18 of June, 2011 Oceanographic Services Copenhagen, Denmark Finnish Meteorological Institute. Background. Coastal radars are part of an existing VTS network

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Real-Time Sea Ice Detection from Coastal Radars

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  1. Real-Time Sea Ice Detection from Coastal Radars 3rd Ice Analyst Workshop Tuomas Niskanen 14-18 of June, 2011 Oceanographic Services Copenhagen, Denmark Finnish Meteorological Institute

  2. Background • Coastal radars are part of an existing VTS network • VTS = Vessel Traffic Service • 20 to 30 non-military fixed coastal radars along the Finnish coast • The radars are designed for observing targets • Movements of ice are noise which is normally filtered out • With an external device, the filtered signal can be processed in order to get movements of ice out Hailuoto Tankar

  3. Background • ShipSensorNet project in 2008 • Founded by TEKES (Finnish Funding Agency for Technology and Innovation) • External signal capturing device by ImageSoftOy • Ice movements can be brought out from processed filtered signal • The external device can be installed into radars • Vessels, coastal radar stations, etc. • The technology has been in use • RV Aranda • Icebreaker Otso • Hailuoto, Raahe and Tankar

  4. Coastal radars currently used for sea ice monitoring • COASTAL RADARS • TERMA 9 Ghz • X-band • Antenna height • Hailuoto: 30.2 m • Tankar: 37.8 m • 1 HAILUOTO TANKAR BACKGROUND RadarSat-2 image on 10th of Feb 2011

  5. Satellite SAR Image Coastal radar Image vs.

  6. Data flow Image capturing device Coastal radar Ice Service Image post processing at FMI’s server Scientific database Via 3G mobile link Future customers

  7. Advantages • Satellite • Strength: covers large area at one pass • Weakness: passes same area once in 1-2 days • Coastal radar • Strength: covers certain area every 2 seconds • Weakness: maximum coverage approximately 30 km * 30 km • Advantage of coastal radar images and animations • Useful tool for ice forecasting and charting when there are no satellite images available

  8. Area coverage RadarSat-2 Image Coastal Radar Image

  9. Ice motion, divergence and rotation determined from consecutive images IMAGE INTERVAL 2 sec SIZE 30 km DIVERGENCE red = closing blue = opening ROTATION red = clocwise blue = anticlocwise

  10. Coastal radars in operational use at FMI • Today at Finnish Ice Service • Animation is created with 2 minutes interval • Length of animation is 2 days • In daily operational use since Jan 2011 • Several other operational and research options

  11. Coastal radars in operational use at FMI • Future plans • More image capturing devices need to be installed • One will be installed to the Quark for winter 2011-12 • In the future a mosaic of several devices? • Different animations (divergence, rotation)? • Colorization of black-white images? • can bring out more details from ice field

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