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A Digital Radar System for Echo Studies On Ice Sheets

  • Donald G. Schultz (a1), Lee A. Powell (a1) and Charles R. Bentley (a1)

Abstract

A digital radar system comprising multiple microprocessors, for use with 50 MHz radar units modified from the Scott Polar Research Institute Mark IV design, is described. The major features of the system include coherent integration of radar traces, storage of data in raw digitized form without demodulation, real-time play-back of digitized information, and high system performance resulting in good spatial sampling with integration even in airborne operations. Unfocused synthetic beam shaping also results from the integration of echoes, thus reducing clutter or incoherent scattering from the sides of the beam pattern along the profiling track.

Examples of data collected during the austral summer of 1985–86 in the Antarctic on ice stream B, in both ground and airborne programs, illustrate both the flexibility in data presentation and features present in the records.

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Copyright

References

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Bentley, C R and 6 others 1987 Remote sensing of the Ross ice streams and adjacent Ross Ice Shelf, Antarctica. Annals of Glaciology 9:
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Dowdeswell, J A, Drewry, D J, Cooper, A P R, Gorman, M R, Liestøl, O, Orheim, O 1986 Digital mapping of the Nordaustlandet ice caps from airborne geophysical investigations. Annals of Glaciology 8: 5158
Evans, S, Smith, B M E 1969 A radio echo equipment for depth sounding in polar ice sheets. Journal of Scientific Instruments (Journal of Physics E) Ser 2, 2: 131136
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Musil, G J, Doake, C S M 1987 Imaging subglacial topography by a synthetic aperture radar technique. Annals of Glaciology 9:
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Shabtaie, S, Bentley, C R 1987 West Antarctic ice streams draining into the Ross Ice Shelf: configuration and mass balance. Journal of Geophysical Research 92(B2): 13111336

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