Video-Laser-GPS Sensor System
Surface ice roughness has been measured by laser altimeters mounted on fixed-wing aircraft and ice concentration has been measured by video cameras mounted on helicopters. The current system of video-laser mounted on a helicopter gives both altimeter roughness profiles and ice concentration/floe size estimates using GPS (Global Positioning System) positioning.
The Video Sensor System is composed of a laptop computer, small power/signal distribution box, and a "pod" that is mounted on the helicopter's skid. A digital video camera Axis 210 (Axis Communications) and an Optech3 Alpha laser altimeter are protected inside the pod which has glass port-holes for viewing. The video frames are captured in real-time and are presented in a mosaic that is used to provide information on ice type, ice concentration, ridging (distribution), floe and lead statistics, and rafting. The laser altimeter measures ice surface roughness. Location data from the helicopter's Trimble 3100T GPS receiver is logged with the other data. The system is flown alone or in combination with the Ice Probe and Ice Pic.
The logging program displays captured images and current outputs the GPS receiver, laser altimeter, from and radar altimeter. The data are logged from each devise with a time-stamp.
- The distance between centres of adjacent images and the helicopter's heading can be used to plot the video frame as a continuous image.
- Viewer software provides plots of laser ice roughness, flight path, and a histogram of ice roughness.
- Observing Pack Ice Properties with Helicopter-borne Sensors (PDF)
- Observing Pack Ice and Under-lying Runoff Buoyant Plume Properties with Helicopter-borne Sensors (PDF)
- Sea Ice Properties Observed With Helicopter-borne Sensors and ENVISAT ASAR Imagery over the Eastern Beaufort Shelf (PDF)
- Data Link
- 2003 Gulf of St. Lawrence field data
- EM ice probe
- snow and ice thickness radar system
- ice properties
- EM fixed-mount ice probe (Ice Pic)
- Confederation Bridge and the local ice regime
- Lalumiere, L. 1998. "BIO Video Sensor System Field and Data Report
- Lalumiere, L. 1999. "Video Sensor System Analysis Report"
- Prinsenberg, S. J., I. K. Peterson, and L. Lalumiere. 1999. "Video/Laser Helicopter Sensor to Collect Pack Ice Properties for Validation of RADARSAT SAR Backscatter Values"
- Lalumiere, L., S. Prinsenberg, and I. Peterson. 2000. "Observing Pack Ice Properties with a Helicopter-Borne Video-Laser-GPS Sensor"
- Peterson, I. K., S. J. Prinsenberg, J. S. Holladay, and L. Lalumiere. 2000. "Mapping Sea Ice Properties with a Helicopter-Borne Electromagnetic-Induction and Video System"
- Peterson, I. K., S. J. Prinsenberg, J. S. Holladay, and L. Lalumiere. 2000. "Mapping Sea Ice Thickness with RADARSAT and a Helicopter-Borne Electromagnetic-Induction System"
- Prinsenberg, S. J. and I. K. Peterson. 2001. "Pack Ice Thickness and Concentration Measurements from the Area Around Confederation Bridge (Canada) Using Helicopter-borne Sensors"
- Prinsenberg, S. J. and I. K. Peterson. 2003. "Comparing ice chart parameters against ice observations"
- Lalumiere, L. 2006. Ground Penetrating Radar for Helicopter Snow and Ice Surveys
- Lalumiere, L. and S. Prinsenberg. 2009. "Integration of a Helicopter-Based Ground Penetrating Radar (GPR) with a Laser, Video and GPS System".
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