Summary
of Proposed Field Work RTZ7 & RTZ8 |
(1997-
98) (1998-99) |
Project
Information Package |
|
Transantarctic
Mountains, PPT Corridor |
RTZ7 |
||
| Principal Investigators: | ||
|
Robin
E. Bell |
W.
Roger Buck |
Donald
Blankenship Institute for Geophysics The University of Texas at Austin 4412 Spicewood Springs Rd., Bldg. 600 Austin, TX 78759 blank@utig.ig.utexas.edu |
| Project Objectives: |
| 1. Determine the architecture of the TAM rift system. |
| a. Determine distribution and structure of sedimentary basins, glacial erosion, and mafics |
| b. Conduct three long wavelength transects utilizing gravimetry, magnetics, ice penetrating RADAR, and ice surface measurements |
| 2. Quantify geodynamic mechanisms leading to extreme rift flank uplift |
| 3. Test geodynamic models to understand TAM dynamics and rift flank uplift in general |
| Summary from SOAR proposal response: |
| The 97-98 season target is the Pensacola Transect (PPT) covering 750x100 km, reaching 200 km towards hte Transantarctic Mountains and Ross Embayment. This transect is to be flown with 10x30 km line spacing. |
| SOAR will provide transect data products of gravity, magnetics, radar, laser altimeter, and GPS |
| Twenty-eight flights over 25 days of utility Twin Otter support. |
| Flight Information: | |||||||||||||
| A. TAM Flight Targets: The PPT corridor consists of 11 lines 840 km long paralleling the 150°W longitude and separated by 10 km. There are 28-130 km long cross lines each separated by 30 km | |||||||||||||
| B. Coordinate Systems: | |||||||||||||
| PPT: | |||||||||||||
| Coordinate System: | Transverse Mercator | ||||||||||||
| Grid Origin Lat, Long (deg): | -90, -150 | ||||||||||||
| Grid Origin Shift X,Y (m): | 0.0, 0.0 | ||||||||||||
| Grid Rotation (deg:) | 0 | ||||||||||||
| Standard Parallels (deg): | -75.0, -77.0 | ||||||||||||
| Semi-major, semi-minor axes: | 6378137.0, 6356752.3141 | ||||||||||||
| Scaling factor: | 0.99960 | ||||||||||||
| C. Elevations: Surveys will be flown 350m above the highest elevation in the block. All transects will be flown 3700 m = 12,140' | |||||||||||||
| D. Radar Resolutions: Radar resolution will be 20ns everywhere, 80µs records, 2048 returns stacked | |||||||||||||
| E. Radar Blanking: Radar blanking will occur under all circumstances when magnetic data is collected. | |||||||||||||
| F. Radar Altimeter: The radar altimeter will be used at pilot's discretion. | |||||||||||||
| G. Extended Run-ins and Run-outs: 15 km run-ins and run-outs with explicit waypoints, and a midpoint for long transects. | |||||||||||||
| H. Communication of Flight Plans: Designated points of contact between pilots and SOAR will be JWH and VEL. | |||||||||||||
| I. Flight Sequencing: Scheduled as weather permits. | |||||||||||||
| The Robb Glacier Transect will be flown during the period between 11/29/99 and 12/5/99. | |||||||||||||
| Flights scheduled as weather permits | |||||||||||||
| J. Flight Windows: There will be three flight windows per day and one no-fly window consistent with a daily magnetic noisy period. Flights will be during the following GMT periods: | |||||||||||||
|
|
|||||||||||||
| K. Flight Planning Documents: Flight planning documents will be prepared by JWH and VEL and distributed to flight and ground crews prior to each flight. Copies of all flight plans are saved as part of SOAR flight logs. | |||||||||||||
| L. Reflight Criteria: Flights with reflights occurring in sequence until the project is completed. If good quality data is collected in less than the designated number of flights, SOAR will move on to the next project. | |||||||||||||
| M. Weather Contingencies: Within a transect, a single jump of 2000' can be made within a flight line, given bad weather. Within a set, first priority will be given to flights where laser is essential; secondary plans will be those where laser acquisition is possible. If too many clouds, | |||||||||||||
| N. Leap Second: n/a | |||||||||||||
| O. FOP/EDS interface: | |||||||||||||
| P. Gravity Ties: Gravity data will be collected at Down B and South Pole, then back to Down B during the South Pole visit. Gravity data will also be collected at Siple Dome, Down B, and back at Siple Dome in a single day, if possible. | |||||||||||||
| Q. Base Station Issues: Siple Dome will be the base of operations with aadditional GPS and magnetic base stations established at South Pole and Down B. | |||||||||||||
| R. 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 by a member of the Experiment Design group or other trained personnel. Determination if reflights are necessary will be made based on QC results. Science observers in the field may have access to QC products. | |||||||||||||
| S. GPS mask angle: 10° unless holes are introduced, then decrease to 5°. | |||||||||||||
| T. PST Names: Names will incorporate original names for these flight lines with A. | |||||||||||||
|
|||||||||||||
| RTZ8 | ||
| Principal Investigators: | ||
|
Robin
E. Bell |
W.
Roger Buck |
Donald
Blankenship Institute for Geophysics The University of Texas at Austin 4412 Spicewood Springs Rd., Bldg. 600 Austin, TX 78759 blank@utig.ig.utexas.edu |
| Project Objectives: |
| 1. Determine the architecture of the TAM rift system. |
| a. Determine distribution and structure of sedimentary basins, glacial erosion, and mafics |
| b. Conduct three long wavelength transects utilizing gravimetry, magnetics, ice penetrating RADAR, and ice surface measurements |
| 2. Quantify geodynamic mechanisms leading to extreme rift flank uplift |
| 3. Test geodynamic models to understand TAM dynamics and rift flank uplift in general. |
| Summary from SOAR proposal response: |
| The 98/98 season target is the Pensacola-Pole Transect (PPT). The corridor parallels the 150 meridian from the South Pole towards the Transantarctic Mountains and the Ross embayment. The survey area covers a 750 x 1000 km area. Y lines (parallel to the 150 meridian) have a 10 km spacing. X-lines are spaced 30 km. |
| SOAR will provide transect data products of gravity, magnetics, radar, laser altimeter, and GPS |
| Twenty eight flights over 25 days of Utility Twin Otter Support. |
| Flight Information: | |||||||||||||
| A. TAM Flight Targets: The PPT corridor is divided into two blocks, E and W. Each block consists of 11 lines parallel to the consists 150°W longitude and separated by 10 km. Lines in the West block are 600 km long; lines in the East block are 210 km long. Tie lines in both blocks are spaced every 30 km and are 100km. A low-level survey will be conducted over the northernmost 90 km of the west block over Ice Stream A. | |||||||||||||
| B. Coordinate Systems: | |||||||||||||
| PPT: | |||||||||||||
| Coordinate System: | Polar Stereographic | ||||||||||||
| Grid Origin Lat, Long (deg): | -90, -150 | ||||||||||||
| Grid Origin Shift X,Y (m): | 0.0, 0.0 | ||||||||||||
| Grid Rotation (deg): | 0 | ||||||||||||
| Standard Parallels (deg): | -75.0, -77.0 | ||||||||||||
| Semi-major, semi-minor axes: | 6378137.0, 6356752.3141 | ||||||||||||
| Scaling factor: | 0.99960 | ||||||||||||
| C. Elevations: Surveys will be flown 350m above the highest elevation in the block. | |||||||||||||
| East Block: | 3400m (11,200') | ||||||||||||
| West Block: | 3400m (11,200') | ||||||||||||
| East block low level survey (F16): | 3150m (10,300') | ||||||||||||
| West block (Ice Stream A low level survey (F28, F31): | 800 m (2650') | ||||||||||||
| D. Radar Resolutions: Radar resolution will be 20ns everywhere, 80µs records, 2048 returns stacked | |||||||||||||
| E. Radar Blanking: Radar blanking will occur under all circumstances when magnetic data is collected. | |||||||||||||
| F. Radar Altimeter: The radar altimeter will be used at pilot's discretion. | |||||||||||||
| G. Extended Run-ins and Run-outs: 15 km run-ins and run-outs with explicit waypoints, and a midpoint for long transects. | |||||||||||||
| H. Communication of Flight Plans: Designated points of contact between pilots and SOAR will be JWH and RRB. | |||||||||||||
| I. Flight Sequencing: TAM/PPT corridor to be flown between December 3, 1998 and Deacember 18, 1998. Flights scheduled as weather permits. | |||||||||||||
| J. Flight Times: There will be three flight windows per day and one no-fly window consistent with a daily magnetic noisy period. Flights will go during the following periods: | |||||||||||||
1230-1700 GMT, 1830-2300 GMT, 0100-0530 GMT (0600-1200 GMT is a no fly period). |
|||||||||||||
| K. Flight Planning Documents: Flight Planning documents will be prepared by JWH and RRB, and distributed to flight and ground crews prior to each flight. Copies of all flight plans are saved as part of SOAR flight logs. |
|||||||||||||
| L .Reflight Criteria: Reflights will occur in sequence until the project is completed. SOAR will survey the corridor until the end of the time allotted for use of NPX and DNB resources, or until the survey is completed. | |||||||||||||
| M. Weather Contingencies: Survey will continue with 1000' jumps (up to 14, 500') to avoid icing. A single descent of 1000' in a transect is possible if it obvious the remainder of the transect will be clear. | |||||||||||||
| N. Leap Second:There is a leap second January 1, 1999, during a no-fly window. Acquisition should not be affected. | |||||||||||||
| O. Gravity Ties: Gravity Measurements were taken at NPX, DNB, and back to NPX within a 24 hour period. | |||||||||||||
| Q. Base Station Issues: TAM/PPT will be flown out of NPX with DNB serving as a secondary base. Flight operations are expected to continue for three days at a time out of DNB. |
|||||||||||||
| R. 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 by a member of the Experiment Design group or other trained personnel. Determination if reflights are necessary will be made based on QC results. Science observers in the field may have access to QC products. | |||||||||||||
| S. GPS mask angle: 10° unless holes are introduced, then decrease to 5°. | |||||||||||||
| T. PST Names: Names will incorporate original names for these flight lines with A. | |||||||||||||
|
|||||||||||||