Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
December 1995
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Ground-Penetrating Radar Investigation of the
Proposed DomeCARA Tunnel Route, and
Utilities at South Pole Station, Antarctica
DPP-872 0063
6. AUTHORS
Steven A. Arcone, Wayne Tobiasson and Allan J. Delaney
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
CRREL Report 95-24
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
National Science Foundation
Arlington, Virginia 22230
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement consult Standard Practice for Use of the International System of Units (SI),
ASTM Standard E380-93, published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa. 19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161.
13. ABSTRACT (Maximum 200 words)
Ground-penetrating radar studies were performed at South Pole Station, Antarctica, during January 1993 to
determine if subsurface obstructions exist along a planned tunnel route from the main station to the new as-
trophysical research area on the far side of the skiway, and if various man-made subsurface features such as
sewage sumps, a water well, utilidors and buried buildings could be located and delineated. The maximum
depth of interest for the tunnel survey was approximately 10 m. For it, a short-pulse antenna transducer with
its antenna bandwidth centered near 400 MHz was towed along the ground surface over multiple traverses to
cover an area up to 60 m wide. The survey extended from the South Pole Station fuel arch, across the skiway
and then to the CARA site (Center for Astrophysical Resarch in Antarctica). The radar profiles show reflec-
tions from density layering within the snow caused by traffic and diffractions from artificial features within 13
m depth. Debris is present in the snow west of the skiway and near the fuel bladder near the taxiway. Targets
within 100 m of the west side of the skiway are extensive, and appear to be metallic. The tunnel should be
routed in the clear area north of them. Targets near the fuel bladder are only 3 to 4 m below the surface. The
tunnel could go under them, but as a precaution they could be removed. An additional survey was run over
a 30-m-wide swath from the ASTRO facility at the CARA site to the new elevated dormitory, a distance of
approximately 800 m. This swath appears to be clear of any subsurface debris, except very near the dormitory.
14. SUBJECT TERMS
15. NUMBER OF PAGES
32
Antarctica
Ground-penetrating radar
Cold regions
South Pole Station
16. PRICE CODE
GPR
Tunnel survey
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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