منابع مشابه
Radio Echo Sounding of the Greenland Inland Ice
Radio echo sounding has been used for a number of years in the exploration of polar ice such as the inland ice in Greenland and Antarc tica. By means of this technique a number of important glaciological and geophysical parameters may be deter mined. Examples are ice thickness, bedrock topography and structure, stratification patterns which are used for climate and flow patterns studies, and ...
متن کاملInstruments and Methods Improved method to determine radio-echo sounding reflector depths from ice-core profiles of permittivity and conductivity
We present a technique that modifies and extends down-hole target methods to provide absolute measures of uncertainty in radar-reflector depth of origin. We use ice-core profiles to model wave propagation and reflection, and then cross-correlate the model results with radio-echo sounding (RES) data to identify the depth of reflector events. Stacked traces recorded with RES near the EPICA drill ...
متن کاملDual-Frequency and Multi-Receiver Radars for Sounding and Imaging Polar Ice Sheets
We developed radars for operation at 150 MHz with a bandwidth of 20 MHz and 450 MHz with a bandwidth of 30 MHz with multiple receivers for sounding and imaging polar ice sheets. The system consists of six receivers used to collect and digitize signals from each element of an antenna array. The antennas consisted of two fourelement dipole-arrays mounted under each wing of a NASA P-3 aircraft. We...
متن کاملInstrwnents and Methods Miniature high-power illlpulse transmitter for radio-echo sounding
We have developed a miniature high-power impulse transmitter for radio-echo sounding of glaciers. It features two synchronous second break-down pulse generators operating in a differential configuration. Specifications include bipolar 550 V pulses having rise times less than 2 ns, 512 Hz repetition rate, 180 mA at 10-14 V d.c. operating power, 5 mA standby current and maximum dimension of 12 cm...
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ژورنال
عنوان ژورنال: Journal of Environmental and Engineering Geophysics
سال: 2007
ISSN: 1083-1363,1943-2658
DOI: 10.2113/jeeg12.1.47