Download or read book Airborne Electromagnetic Sensing of Sea ice Thickness written by Guimin Liu and published by . This book was released on 1989 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Airborne Electromagnetic Sensing of Sea Ice Thickness written by Guimin Liu and published by . This book was released on 1987 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: One can compute the theoretical response of a frequency domain airborne electromagnetic (AEM) system when it is flown over a perfectly conducting medium with arbitrary surface relief.
Download or read book Electromagnetic Property Trends in Sea Ice Part 1 written by A. Kovacs and published by . This book was released on 1987 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-phase dielectric mixing model results are presented showing the electromagnetic properties of sea ice versus depth. The modeled data are compared with field measurements and show comparable results. It is also shown how the model data can be used in support of impulse radar and airborne electromagnetic(AEM) remote sensing of sea ice. Examples of the remote measurement of sea ice thickness using impulse radar operating in the 80- to 300-MHz frequency band and low-frequency (500 to 30,000 Hz) sounding techniques are presented and discussed. Keywords: Polar regions; Radar pulses.
Download or read book Airborne Electromagnetic Sensing of Sea ice Thickness written by Guimin Liu and published by . This book was released on 1989 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Airborne Electromagnetic Sounding of Sea Ice Thickness and Sub ice Bathymetry written by Austin Kovacs and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Airborne Infrared Imagery of Arctic Sea Ice Thickness written by Peter M. Kuhn and published by . This book was released on 1975 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Airborne Electromagnetic Systems for Mapping Thickness of Sea Ice written by A. Becker and published by . This book was released on 1983 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is part of our research program addressing AEM ice thickness determination and will demonstrate that the Navy requirements for rapid airborne methods for mapping ice thickness, in real time, can be accomplished with AEM techniques. At present, there are not reliable airborne techniques for measuring directly sea ice thickness, although impulse radar has yielded promising results by implying sea ice thickness from ice roughness measurements.
Download or read book Sea ice Thickness Measurement Using a Small Airborne Electromagnetic Sounding System written by and published by . This book was released on 1990 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remote Sensing of Sea Ice and Icebergs written by Simon Haykin and published by John Wiley & Sons. This book was released on 1994-10-28 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the latest remote sensing technologies used to detect ice hazards in the marine environment; map surface currents, sea-state and surface winds; study ice dynamics, over ice transportation, oil spill countermeasures, climate changes and ice reconnaisance. Includes such technologies as acoustic sensing, ice-thickness measurement, passive microwave remote sensing, ground wave and surface-based radars.
Download or read book Sea Ice written by Mohammed Shokr and published by John Wiley & Sons. This book was released on 2023-04-20 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: SEA ICE The latest edition of the gold standard in sea ice references In the newly revised second edition of Sea Ice: Physics and Remote Sensing, a team of distinguished researchers delivers an in-depth review of the features and structural properties of ice, as well as the latest advances in geophysical sensors, ice parameter retrieval techniques, and remote sensing data. The book has been updated to reflect the latest scientific developments in macro- and micro-scale sea ice research. For this edition, the authors have included high-quality photographs of thin sections from cores of various ice types, as well as a comprehensive account of all major field expeditions that have systematically surveyed sea ice and its properties. Readers will also find: A thorough introduction to ice physics and physical processes, including ice morphology and age-based structural features Practical discussions of radiometric and radar-scattering observations from sea ice, including radar backscatter and microwave emission The latest techniques for the retrieval of sea ice parameters from space-borne and airborne sensor data New chapters on sea ice thermal microwave emissions and on the impact of climate change on polar sea ice Perfect for academic researchers working on sea ice, the cryosphere, and climatology, Sea Ice: Physics and Remote Sensing will also benefit meteorologists, marine operators, and high-latitude construction engineers.
Download or read book A Design and Implementation of a Low power Embedded System for Data Collection in an Airborne Sea Ice Thickness Observing System written by Thimira Sanuka Thilakarathna Asurapmudalige and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Long-Range Airborne Snow and Sea Ice Thickness Observing System (LASSITOS) is an airborne electromagnetic (AEM) system, currently under development, which uses a customdesigned instrument mounted on an Unmanned Aerial System (UAS) to measure Arctic sea ice and snow thickness. This project requires specialized instruments that are both low-power and lightweight. This thesis describes a design and implementation of a prototype data logging system based on an ultra-low power microcontroller, for the LASSITOS instrument. Three 32-bit Analog-toDigital Converter (ADC) integrated circuits (IC) are used to sample and convert the receiving EM signal at a rate of 19200 SPS. The system is capable of writing the sampled data and diagnostic data to the SD card at a combined rate of up to 307200 B/s. A 30 KB circular buffer is used to avoid data loss during SD card busy periods. Three DMA channels are used to optimize the communication between the ADCs and the SD card over SPI to achieve these data rates.
Download or read book Towards Multi Channel Inversion of Electromagnetic Sea Ice Surveys written by Anne Irvin and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea ice is a crucial parameter in climate research as it plays an important role in the interaction between oceans and the atmosphere in polar regions. It is considered a climate indicator and it is critical to observe its development in the context of climate change. While sea ice extent provides a picture of the surface conditions of the ice, ice thickness information is needed to fully understand the overall sea ice conditions. Frequency domain electromagnetic (EM) induction sounding is a non-invasive remote sensing method to measure sea ice thickness changes on the regional scale as well as provide a means to calibrate and validate satellite ice thickness data. This PhD thesis aims to advance the analysis of airborne and ground based sea ice thickness measurements from frequency domain EM sounding by improving ice thickness retrievals with concurrent use of Inphase and Quadrature instrument responses in a numerical inversion for multi- and single-frequency devices. The developed methods and algorithms include the forward modelling code and GUI ODFEM (One Dimensional Frequency domain Electromagnetic Model) to simulate the EM instrument responses for Inphase and Quadrature for different instrument and model settings. Furthermore, a brute force inversion method was established which can be used in combination with the 1D forward models created with ODFEM to invert single- and multi-frequency EM data into multi-layer ice thicknesses and ice conductivities. The performance of the developed brute force inversion algorithm is demonstrated on a variety of field data sets including an approach on how to resolve the thickness of a slush layer and its conductivity (wet saline snow) using a five-layer-model and the data of 3 measurement frequencies. Furthermore, how to measure the thickness and determine the conductivity of a sub-ice-platelet-layer commonly observed in Antarctica is demonstrated using an inversion of the two channel output of a single-frequency instrument (Inphase and Quadrature) in combination with in situ drill hole measurements. The methods and algorithms developed within this thesis provide new and more extended applications for a variety of EM devices for ground based and airborne ice thickness surveys.
Download or read book Airborne Electromagnetic Sea Ice Sounding Measurements During SIMMS 95 written by J. Scott (John Scott) Holladay and published by Dartmouth, N.S. : Fisheries and Oceans Canada. This book was released on 1998 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes and presents results of field testing of an improved airborne electromagnetic ice sounding system that is towed beneath a helicopter. The system can measure distance to the water/ice interface by measuring the amplitude and phase of the secondary electromagnetic field (generated by eddy currents excited by low-frequency signals transmitted by an antenna in the sensor bird) relative to the transmitted field. A laser in the sensor bird was used to measure the distance to the snow/air interface. Data presented were collected May 1995 and include snow-plus-ice thickness data from long flight traverses over first- and multi-year ice, together with short traverses in the immediate vicinity of ground truth lines on selected ice floes. Analysis of the airborne measurements showed the extent to which the system can distinguish the two types of ice as well as the improvements in ice thickness measurement accuracy achieved by the system.
Download or read book Airborne Electromagnetic Sea Ice Sounder Measurements of RADARSAT Validation Project 1996 written by Moucha, R. Z and published by Dartmouth, N.S. : Fisheries and Oceans Canada. This book was released on 1998 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Airborne Electromagnetic Sea Ice Sounding Measurements During SIMMS 95 written by J. Scott Holladay and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes and presents results of field testing of an improved airborne electromagnetic ice sounding system that is towed beneath a helicopter. The system can measure distance to the water/ice interface by measuring the amplitude and phase of the secondary electromagnetic field (generated by eddy currents excited by low-frequency signals transmitted by an antenna in the sensor bird) relative to the transmitted field. A laser in the sensor bird was used to measure the distance to the snow/air interface. Data presented were collected May 1995 and include snow-plus-ice thickness data from long flight traverses over first- and multi-year ice, together with short traverses in the immediate vicinity of ground truth lines on selected ice floes. Analysis of the airborne measurements showed the extent to which the system can distinguish the two types of ice as well as the improvements in ice thickness measurement accuracy achieved by the system.
Download or read book Airborne Electromagnetic Sea Ice Sounder Measurements of RADARSAT Validation Project 1996 written by R. Z. Moucha and published by . This book was released on 1998 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An airborne electromagnetic-laser altimeter sensor system has been developed to measure snow-plus-ice thickness and surface ice cover roughness. This report documents the electromagnetic ice sounder (EIS) data set and the results of post-processing of the data acquired over the ice cover of the Gulf of St. Lawrence and southern Labrador Shelf during early 1996. Much of the EIS profiling was performed at times close to RADARSAT overpasses to facilitate the validation of different ice signatures present in the satellite's synthetic aperture radar images of the area. Extensive surface measurements were collected in the study areas before, during, and after the airborne survey program. The EIS data were validated using these surface measurements and system performance is evaluated.
Download or read book Development of an Airborne Sea Ice Thickness Measurement System and Field Test Results written by Austin Kovacs and published by . This book was released on 1989 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent efforts to improve airborne electromagnetic induction-measurement technology and to downsize the related helicopter-towed antenna assembly from about 7.5 m long to about 3.5 m long for use in airborne measurement of sea ice thickness are discussed, as are the results from arctic field testing. Also outlined are the system noise and drift problems encountered during arctic field evaluation, problems that adversely affected the quality of the sounding data. The sea ice sounding results indicate that it should be possible to determine thickness to within 5% for ice floes with moderate relief but that, because of sounding footprint size and current model algorithm constraints, steepsided pressure ridge keels cannot be well defined. The findings also indicate that routine sea ice thickness profiling from an airborne platform is close at hand with further system improvement, as is the apparent capability to determine the conductivity of the sea ice, from which an assessment of sea ice strength can be made. Keywords: Airborne profiling; Electromagnetic induction measurement technology; Sea ice thickness. (EDC).
