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Sea ice thickness measurements by ultrawideband penetrating radar: First results

Benjamin Holt, Pannirselvam Kanagaratnam, Siva Prasad Gogineni, Vijaya Chandran Ramasami, Andy Mahoney, Victoria Lytle
2009 Cold Regions Science and Technology  
The system includes a low-frequency mode that operates from 50-250 MHz for measuring sea ice thickness in the range of 1 to 7 m (both first-year and multiyear ice types) and a high-frequency mode that  ...  We discuss approaches for further system improvements and implementation of such a system on an airborne platform capable of providing regional sea ice thickness measurements for both first-year and multiyear  ...  for instrument development and field support, Glenn Sheehan and Matthew Irinaga of the Barrow Arctic Research Consortium for logistical support, and Brandon Heavey of the Jet Propulsion Laboratory for  ... 
doi:10.1016/j.coldregions.2008.04.007 fatcat:4ftj2ng34jbp3lmwerfdkxrqve

Microwave Emission and Scattering from Ocean Surface Waves in the Southern Beaufort Sea

Mukesh Gupta, Randall K. Scharien, David G. Barber
2014 International Journal of Oceanography  
Estimates of the relationships between geophysical variables and microwave backscatter/emission are important for the evaluation of atmosphere-ocean interaction, as well as energy, and mass transfer across  ...  The polarimetric coherence parameter ρVVHH at 20° also shows an inverse relationship with Hm0 because of an expected decorrelation of complex returns with greater surface roughness.  ...  A low frequency, primary EM field generated by the transmitting coil of an EM system penetrates the sea ice almost unaffected, while it generates eddy currents in the seawater below the sea ice underside  ... 
doi:10.1155/2014/872342 fatcat:slkovv7cxrgffnk3j7loxma5xy

2015 Index IEEE Transactions on Geoscience and Remote Sensing Vol. 53

2015 IEEE Transactions on Geoscience and Remote Sensing  
Fine-Resolution Radar Altimeter Measurements on Land and Sea Ice.  ...  An, J., +, TGRS Jan. 2015 567-577 An Efficient Multiregion FEM-BIM for Composite Scattering From an Arbitrary Dielectric Target Above Dielectric Rough Sea Surfaces.  ...  Radiofrequency interference A Methodology to Determine Radio-Frequency Interference in AMSR2 Observations.  ... 
doi:10.1109/tgrs.2015.2513444 fatcat:zuklkpk4gjdxjegoym5oagotzq

Sea ice local surface topography from single-pass satellite InSAR measurements: a feasibility study

Wolfgang Dierking, Oliver Lang, Thomas Busche
2017 The Cryosphere Discussions  
Quantitative parameters characterizing the sea ice surface topography are needed in geophysical investigations such as studies on atmosphere-ice interactions or sea ice mechanics.  ...  In this paper the potential of InSAR measurements is examined for several satellite configurations and radar frequencies, considering statistics of heights and widths of ice ridges as well as possible  ...  For the dielectric constant of sea ice, results of measurements are presented in Hallikainen and Winebrenner (1992, their Figs. 3 .5 and 3.6) for different ice types, depending on salinity and temperature  ... 
doi:10.5194/tc-2017-40 fatcat:chntt5ma3ncwxfnte7bxg3h7ma

Sea ice local surface topography from single-pass satellite InSAR measurements: a feasibility study

Wolfgang Dierking, Oliver Lang, Thomas Busche
2017 The Cryosphere  
</strong> Quantitative parameters characterizing the sea ice surface topography are needed in geophysical investigations such as studies on atmosphere–ice interactions or sea ice mechanics.  ...  In this paper the potential of InSAR measurements is examined for several satellite configurations and radar frequencies, considering statistics of heights and widths of ice ridges as well as possible  ...  For the dielectric constant of sea ice, results of measurements are presented in Hallikainen and Winebrenner (1992, their Figs. 3 .5 and 3.6) for different ice types, depending on salinity and temperature  ... 
doi:10.5194/tc-11-1967-2017 fatcat:uejyxjfjfjbw5mmnc2nfsp566i

Superconducting detectors and mixers for millimeter and submillimeter astrophysics

J. Zmuidzinas, P.L. Richards
2004 Proceedings of the IEEE  
bolometers, and the work on tunnel junction (superconductor-insulator-superconductor) and hot-electron mixers.  ...  This paper describes the scientific opportunities, the basic physics of these devices, the techniques for radiation coupling, and reviews the recent progress in direct detectors, such as transition-edge  ...  Thus, the current turns on sharply for , as shown in Fig. 10 . However, when an RF field at frequency is applied, photon-assisted tunneling is possible, which now can occur for .  ... 
doi:10.1109/jproc.2004.833670 fatcat:4lxpstexefformmcjgja2pzo5y

2020 Index IEEE Transactions on Instrumentation and Measurement Vol. 69

2020 IEEE Transactions on Instrumentation and Measurement  
Meenalochani, M., and Sudha, S., Influence of Received Signal Strength on Prediction of Cluster Head and Number of Rounds; TIM June 2020 3739-3749 Hendeby, G., see Kasebzadeh, P., TIM Aug. 2020 5862  ...  Converter Using All-Digital Nested Delay-Locked Loops With 50-ps Resolution and High Throughput for LiDAR TIM Nov. 2020 9262-9271 Helsen, J., see Huchel, L., TIM July 2020 4145-4153 Hemavathi, N.,  ...  for Near-Field Measurement.  ... 
doi:10.1109/tim.2020.3042348 fatcat:a5f4fsqs45fbbetre6zwsg3dly

2019 Index IEEE Transactions on Geoscience and Remote Sensing Vol. 57

2019 IEEE Transactions on Geoscience and Remote Sensing  
., and Drake, V.A., Insect Biological Parameter Estimation Based on the Invariant Target Parameters of the Scattering Matrix; TGRS Aug. 2019 6212-6225 Hu, C., see Zhang, M., TGRS Sept. 2019 6666-6674  ...  on Arbitrary Region of Interest; TGRS Oct. 2019 7995-8010 Hu, T., see Kang, Z., TGRS Jan. 2019 181-193 Hu, T., Wu, Y., Zheng, G., Zhang, D., Zhang, Y., and Li, Y., Tropical Cyclone Center  ...  ., +, TGRS June 2019 3204-3220 Dielectric measurement One-Port Vector Network Analyzer Characterization of Soil Dielectric Spectrum.  ... 
doi:10.1109/tgrs.2020.2967201 fatcat:kpfxoidv5bgcfo36zfsnxe4aj4

Program

2020 2020 IEEE/MTT-S International Microwave Symposium (IMS)  
Ellinger; Technische Universität Dresden Tu3D-1: An SIW Oscillator for Microfluidic Lossy Medium Characterization M. Abdolrazzaghi; Univ. of Alberta; N. Kazemi; Univ. of Alberta; M.  ...  Wireless power transfer at a distance is an example of an emerging third prong of novel use cases for RF and mm-waves integrated circuits.  ...  Th3D-4: A Radar System Concept for 2D Unambiguous Angle Estimation  ... 
doi:10.1109/ims30576.2020.9223840 fatcat:bx4dclbhwnfv3in7m6h2it7r3u

High‐intensity, focused ultrasonic fields

Leif Bjørnoø
1988 Journal of the Acoustical Society of America  
The intensity technique was initially developed for sound power measurements but it can be used as a general tool for sound field investigations.  ...  The tutorial will briefly handle the precision of the measurements. A great deal of time will be devoted to examples of applications on radiation from simple and complex sources and their nearfields.  ...  At an Arctic ice camp in the Beaufort Sea, monostafic acoustic reflections near normal incidence were measured from the lower face of an isolated block of natural sea ice.  ... 
doi:10.1121/1.2025494 fatcat:yhmkhlqhivbwnp2lxraret33iq

Relevance of time‐varying properties of the first formant frequency in vowel representation

Maria‐Gabriella Di Benedetto
1985 Journal of the Acoustical Society of America  
The spectrum of rain noise, for wind speeds below 1.5 shows a peak of 13.5 kHz with a sharp cutoff on the low-frequency side and a gradual falloff{7 dB per octave) on the high-frequency side.  ...  In an investigation of the production of loud speech, it is found that, in comparison with normal speech, these productions are characterized by a substantially lowered jaw position for all vowels.  ...  These complaints and low-frequency noises were investigated. Psycholog/cal and physiological influences on univer•ty students and low-frequency noise sufferers were investigated in a laboratory.  ... 
doi:10.1121/1.2023018 fatcat:3lbckbce2rglzj7zx3fp4nhiui

On fatigue life under stationary Gaussian random loads

Ramesh Talreja
1973 Engineering Fracture Mechanics  
--Separated hydrophones in the sea show varying degrees of coherence, or waveform similarity, depending on separation, frequency, and kind of sound observed.  ...  A unique technique, involving cross correlation between the near-field pressure and the far-field sound measured by the boom mounted microphone, yielded significant information on the distribution of acoustic  ...  Measured noise levels near a diffuse ice edge were about 4 dB higher than open water levels, and about 10 dB higher than levels far iu the ice field.  ... 
doi:10.1016/0013-7944(73)90064-7 fatcat:eue2d6byvre4zczgb7qi5np5vi

On Fatigue Life Under Stationary Gaussian Random Loads

R. Talreja
1973 Journal of the Acoustical Society of America  
--Separated hydrophones in the sea show varying degrees of coherence, or waveform similarity, depending on separation, frequency, and kind of sound observed.  ...  A unique technique, involving cross correlation between the near-field pressure and the far-field sound measured by the boom mounted microphone, yielded significant information on the distribution of acoustic  ...  Measured noise levels near a diffuse ice edge were about 4 dB higher than open water levels, and about 10 dB higher than levels far iu the ice field.  ... 
doi:10.1121/1.1982256 fatcat:w7xnxse54nerdlhsueme325zem

A coupled bispectral, temporal and spatial coherence function of the pressure field, scattered from a moving sea surface

Christian Bjerrum‐Niese, Leif Bjo/rno/
1995 Journal of the Acoustical Society of America  
Technical Advisory Groups for ISO/TC 43 (P. D. Schomer), and IEC/TC 29 (V. Nedzelnitsky), will report on current activities of these international Technical Committees.  ...  methods of measurement and test, and terminology in the fields of mechanical shock and physiological acoustics, including aspects of general acoustics, shock, and vibration which pertain to biological  ...  The technique is currently designed for analyzing low-frequency (5-60 Hz) noise collected from the central Arctic pack ice.  ... 
doi:10.1121/1.414267 fatcat:gtdrkztuvfbova3a4rdj2f7umu

Ray tracing in a turbulent, shallow‐water channel

Christian Bjerrum‐Niese, René Lützen, Leif Bjo/rno/
1998 Journal of the Acoustical Society of America  
Additional comments will address breaker types and factors affecting breaker height and the noise due to waves breaking on the ice edge of the Greenland Sea.  ...  Breaking waves are a major source of sea surface sound and breaking events produce sound at frequencies as low as 10 Hz.  ...  sea medium with an arbitrary number of layers.  ... 
doi:10.1121/1.422455 fatcat:vqypn7trzberzap3bkznkoddcu
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