Untitled Document
Summary of Field Work Proposed RTZ9
Project Information Package
Divide (DVD)
Principal Investigators

E.D. Waddington
Geophysics Program
Box 351650
University of Washington
Seattle, WA 98195

Tel: (206) 543-4585
Fax: (206) 543-0489


D.D. Blankenship
Institute for Geophysics
University of Texas at Austin
4412 Spicewood Springs Dr.
Building 600
Austin, TX 78759

Tel: (512) 471-0489


D.L. Morse
Institute for Geophysics
University of Texas at Austin
4412 Spicewood Springs Dr.
Building 600
Austin, TX 78759

Tel: (512) 471-6156


Project Objectives :

Study the glaciological behavior of the Amundsen-Ross ice divide region. Determine the detailed variations in surface, bedrock, and internal layer geometries along the flow lines, combine this information with ice flow models, and infer the history of the ice divide, i.e., how the divide is migrating. Information will help test ice shelf collapse theories on both sides of the divide. Results will also provide time scale and layer thickness information for other science projects.

Summary from SOAR proposal response:
1. Nine flight lines propossed, each approximately 120 km in length and approximately 10 km apart.
2. Each line will be flown at constant terrain clearance (drape),
4. The survey will be conducted from Byrd Surface Camp (NYB).
5. Gravity and magnetic data are not required for this survey.
6. Flight paths will consist of multiple waypoints along the ice flow line.
7. The work should be accomplished in 7 flights.
8. Data products to be delivered are raw laser, avionics and radar data, and reduced differential carrier-phase GPS positions.

Flight Information:
A. Divide Flight Target: Transects between defined waypoints (not on a grid).
B. Coordinate System:
Grid Origin Lat, Long (deg):
Grid Origin Shift X, Y (m):
Grid Rotation (deg):
Standard Parallels (deg):
Semi-major, semi-minor axes:
Lambert Conformal Conic
-82.5, 105
343122.675, 203866.49
-81.5, -83.5
6378137, 6356752.3141
C. Elevations: Flight paths will be flown at designated elevations between midpoints.
D. Radar settings: Each line will be flown twice, once at 250 ns pulsewidth, 4MHz bandwidth, 80 microseconds pulse interval, 2048 returns stacked, and once at 60 ns pulsewidth, 14 MHz badwidth, 80 ms pulse interval and 2048 returns stacked. Due to various circumstances some lines were flown at 125 ns pulsewidth, 14 MHz bandwidth, 80 microsecond pulse interval, 2048 returns stacked.
E. Radar Blanking: No radar blanking necessary.
F. Radar Altimeter: The radar altimeter will be used at pilot's discretion.
G. Extended run-ins and run-outs: Run-ins and run-outs of 15.9 km with explicit waypoints for endpoints only.
H. Communication of Flight Plans: Designated Point of Contact between pilots and SOAR will be JWH, DLM and LVK.
I. Flight Sequencing: Scheduled during SOAR activites at NBY.
J. Flight Times: Flight windows have been established consistent with low magnetic noise periods.
K. Flight Planning Documents: Flight Planning documents will be prepared by JWH, DLM, or LVK and distributed to flight and ground crews prior to each flight. Copies of flight plans are saved as part of SOAR flight logs.
L. Reflight Criteria: In sequence as time and weather permits.
M. Weather Contingencies: Abort if icing.
N. Leap Second: There is no leap second scheduled for the end of December 1999.
O. Base Station Issues: NBY will be the sole base of operations.
P. QC Review: Data will be broken out immediately after a flight. Each flight line will be given an initial review and rated for overall data quality. Determination if reflights are required will be made at that time. Science observers in the field amy have access to Quality Control products.
Q. GPS Mask Angle: 10 degrees unless holes are intorduced, then decrease to 5 degrees.
R. PST Names:
X## or Y##