NDLI: A wideband radar depth sounder for measuring the thickness of glacial ice

Content Provider	IEEE Xplore Digital Library
Author	Kuchikulla, A. Gogineni, S.P. Kanagaratnam, P. Akins, T.L.
Copyright Year	2004
Description	Author affiliation: Radar Syst. & Remote Sensing Lab., Kansas Univ., Lawrence, KS, USA (Kuchikulla, A.; Gogineni, S.P.; Kanagaratnam, P.; Akins, T.L.)
Abstract	We developed a wideband coherent radar depth sounder (WCORDS) system developed to measure glacial ice thickness and map internal layers with high resolution. The radar operates over a frequency range of 50-200 MHz, providing a resolution of about 1 m in ice. A high-speed arbitrary waveform generator (AWG) is used to generate a chirp from 50-200 MHz over a very small pulse width to obtain high sensitivity needed to sound 5-km thick cold ice and map internal layers high resolution. It also consists of a two-channel receiver to obtain very high dynamic range. The low-gain channel is used to map the shallow internal layers and the high-gain channel provides ice sheet thickness and bedrock properties up to a depth of 5000 m. The gain in both the channels can be adjusted to obtain optimum performance. A high-speed data acquisition system is used to digitize and perform necessary real time processing on the data before transferring it to the storage device. The radar and data-acquisition systems have been significantly miniaturized using the latest RF and fabrication technologies. The entire system is designed to fit into multiple compact-PCI cards. Laboratory tests show that the radar system has the required sensitivity to map 5000-m-thick ice. Considerable improvement in sidelobe performance was achieved. The radar system will be tested during the summer 2004 field experiment at the Summit Camp, Greenland.
File Size	1576277
File Format	PDF
ISBN	0780387422
DOI	10.1109/IGARSS.2004.1368956
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radar measurements Thickness measurement Ice thickness System testing Frequency Signal generators Pulse generation Chirp Space vector pulse width modulation Dynamic range
Content Type	Text
Resource Type	Article

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