|
Summary
of Field Work Proposed RTZ7 & RTZ9 |
|
(1997/98
& 1999/00) |
|
Project
Information Package |
|
LIV |
| |
RTZ7
| Principal Investigators: | |
| Ian
Whillans Dept. of Geological Sciences and Byrd Polar Research Center The Ohio State University Columbus, OH 43210-1002 whillans+@osu.edu |
Beata
Csatho Byrd Polar Research Center The Ohio State University 108 Scott Hall, 1090 Carmack Rd. Columbus, OH 43210-1002 csatho@iceberg.mps.ohio-state.edu |
| Project Objectives: |
1.
To Evaluate the accuracy with which existing SOAR equipment is capable
of determining changes in ice sheet elevation with time. |
| Summary from SOAR proposal response: |
| Phase I. Sample data from the facility along with existing algorithms and software were received by investigators January 27, 1997. |
| Phase II. One observer is to travel to the field to work at the SOAR base camp. These field activities are subdivided into five parts |
| 1. Establish and survey the local skiway and over the Siple Dome base camp using ground based methods (to be done by P.I.s). |
| 2. Conduct ground tests and calibration of SOAR equipment. Independent tests of GPS tracking and calibrations to determine relative vectors between GPS antennae and laser components, and determination of zero-offset and range walk of the laser altimeter by means of mirrors and beam attenuators. Results of these tests and calibrations will be compared to those taken by SOAR (done by P.I.). |
| 3. Flights over test sites are to be conducted by SOAR. Four successful flights on different days with different satellite constellations are required. Two flights over a flat region are required to determine the pointing direction of the laser by varying the pitch and roll independently. |
| 4. Make short distance GPS ties between the aircraft and a long-term deep ice motion marker at the Siple Dome "coffee can" site (done by P.I.) |
| 5. After completion of the test program, the SOAR facility is to obtain first-epoch surface elevations over the following sites of glaciological interest: Across B1 "dragon" and "snake", the onset of B1b, the onset of B2a, the ice stream C "bulge". |
| Investigators will require raw data products from GPS, laser altimeter, pressure and INS. |
| Flight Information: |
| A. LIV flight targets: LIV/OB1 consists of three parallel lines approximately 64 km long separated by 4.5 km with three 9km tie lines. OB2 consists of three 73km lines flown approximately 6.9 km apart. Three 13.5 km tie lines will be flown, one at either end and one in the middle. |
| LIV/TKC flights cover an approximate 2420 km2 area. Two 55 km long lines separated by 7.7 km are 44 km from the second set of parallel lines. Three 44 km tie lines cover the area. |
| B. Coordinate System: | |
| Coordinate System | Lambert Conic Conformal |
| Grid Origin Lat, Long (deg) | -85, -180 |
| Grid Origin Shift X,Y, (m) | 0.0, 222600 |
| Grid Rotation (deg) | 0 |
| Standard Parallels (deg) | -81.5, -83.5 |
| Semi-major, semi-minor axes (m) | 6378137.0, 6356752.3141 |
| C. Elevations: | Survey elevations will be flown at 350m above the highest elevation for each block: |
| LIV/OB1: | 800m = 2625' |
| LIV/OB2: | 1050m = 3450' |
| LIV/TKC: | 1050m = 3450' |
| LIV/TKE: | 850m = 2790' |
| LIV/SDM: | 900m = 2950' |
| D. Radar Resolutions: Radar resoultions will be 20 ns everywhere, 2048 stacks, with 80 microsecond records (except over ice stream B there will be 40 microsecond records). | |||||||||||||||||||||||||||||||||||||||||||||
| E. Radar Blanking: No radar blanking necessary. | |||||||||||||||||||||||||||||||||||||||||||||
| F. Radar Altimeter: Used at pilot's discretion. | |||||||||||||||||||||||||||||||||||||||||||||
| G. Extended Run-ins and Run-outs: 15.9 km run-ins and run-outs with explicit waypoints for all transects. | |||||||||||||||||||||||||||||||||||||||||||||
| H. Communication of Flight Plans: Designated Point of Contact between pilots and SOAR (either JLW or SLM). | |||||||||||||||||||||||||||||||||||||||||||||
| I. Flight Sequencing: Scheduled as weather permits. | |||||||||||||||||||||||||||||||||||||||||||||
| J. Flight Times: Flight windows have been established consistent with low magnetic noise periods. Flight windows at 1:30am, 7:30am, and 1:30pm (local time). Windows are approximately 5 hours long | |||||||||||||||||||||||||||||||||||||||||||||
| K. Flight Planning Documents: Flight planning documents will be prepared by JLW or SLM and distributed to flight and ground crews prior to each filght. Copies of all flight plans are saved as part of SOAR flight logs. | |||||||||||||||||||||||||||||||||||||||||||||
| L. Reflight Criteria: Flights will occur 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. Reflights will take place during the remainder of the project. | |||||||||||||||||||||||||||||||||||||||||||||
| M. Weather Contingencies: Given bad weather, a single jump of 1000' can be made during a transect to avoid icing. If clouds interfere with collection of laser data (where laser data is essential), the flight will be aborted. Flights within a set where laser is essential will be given first priority, secondary priority will be given those where laser acquisition is possible. When too many clouds, but still able to fly, plans will include those areas where the survey is laser insensitive. | |||||||||||||||||||||||||||||||||||||||||||||
| 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 site 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. Down B. will serve as a secondart base station. | |||||||||||||||||||||||||||||||||||||||||||||
| 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 JLW or SLM. Determination if reflights are required will be made at that time. Science observers in the field may have acces to Quality Control products. | |||||||||||||||||||||||||||||||||||||||||||||
| S. GPS mask angle: 10°; if holes are introduced, decrease to 5º | |||||||||||||||||||||||||||||||||||||||||||||
| T. PST Names: Names will incorporate our abbreviation for this project (LIV), the geographical location, and transect numbers. Names will look like: | |||||||||||||||||||||||||||||||||||||||||||||
|
RTZ9
| Principal Investigators: | |
Ian
Whillans |
Beata
Csatho |
| Project Objectives: |
1.
To Evaluate the accuracy with which existing SOAR equipment is capable
of determining changes in ice sheet elevation with time. |
| Summary from SOAR proposal response: |
| Phase I. Sample data from the facility along with existing algorithms and software were received by investigators January 27, 1997. |
| Phase II. One observer is to travel to the field to work at the SOAR base camp. These field activities are subdivided into five parts |
| 1. Establish and survey the local skiway and over the Siple Dome base camp using ground based methods (to be done by P.I.s). |
| 2. Conduct ground tests and calibration of SOAR equipment. Independent tests of GPS tracking and calibrations to determine relative vectors between GPS antennae and laser components, and determination of zero-offset and range walk of the laser altimeter by means of mirrors and beam attenuators. Results of these tests and calibrations will be compared to those taken by SOAR (done by P.I.). |
| 3. Flights over test sites are to be conducted by SOAR. Four successful flights on different days with different satellite constellations are required. Two flights over a flat region are required to determine the pointing direction of the laser by varying the pitch and roll independently. |
| 4. Make short distance GPS ties between the aircraft and a long-term deep ice motion marker at the Siple Dome "coffee can" site (done by P.I.) |
| 5. After completion of the test program, the SOAR facility is to obtain first-epoch surface elevations over the following sites of glaciological interest: Across B1 "dragon" and "snake", the onset of B1b, the onset of B2a, the ice stream C "bulge". |
| Phase III. (conducted during 1999): PI's will perform complete analysis of data in Columbus, OH. |
| Phase IV. (conducted during 1999/2000 field season): A reduced test, calibration evaluation program is to be conducted. SOAR is to repeat the elevation surveys of the sites of glacialogical interest as well as the test sites of the prior year, if possible. |
| Investigators will require raw data products from GPS, laser altimeter, pressure and INS. |
| Flight Information: |
| A. LIV flight targets: There are four survey targets over sites of glaciological interest. |
| LIV/OB1 consists of three parallel lines approximately 64 km long (X01, X02, X03) separated by 4.5 km with three 9km tie lines (Y01, Y02, Y03). LIV/OB2 is an irregular grid, located over the onset of Ice Stream B2, with two 73 km lines (X01 and X03) separated by 12 km. Three 12 km tie lines (Y01, Y02, Y03) are evenly spaced over the first two lines. Line X02, located between X01 and X03 is 36 km long, extending from Y01 to Y02. ANother line, the CAS line, extends 93 km from the Y02 tie line to the Casertz coffee can site. |
| LIV/TKC flights cover an approximate 2420 km2 area. Two 55 km long lines separated by 7.7 km are 44 km from the second set of parallel lines. Three 44 km tie lines cover the area. |
| LIV/TKE consists of three paralle llines, separated by approximately 90 km long, with two tie lines of approximately 25 km long. A third tie line will be flown consistent with one of the STI/TKE lines flown during RTZ7. This line is approximately 75 km long. |
| B. Coordinate System: | |
| Coordinate System | Lambert Conic Conformal |
| Grid Origin Lat, Long (deg) | -85, -180 |
| Grid Origin Shift X,Y, (m) | 0.0, 222600 |
| Grid Rotation (deg) | 0 |
| Standard Parallels (deg) | -81.5, -83.5 |
| Semi-major, semi-minor axes (m) | 6378137.0, 6356752.3141 |
| C. Elevations: | Survey elevations will be flown at 350m above the highest elevation for each block: |
| LIV/OB1: | 800m = 2625' |
| LIV/OB2: | 1280m = 4200' |
| LIV/TKC: | 1050m = 3450' |
| LIV/TKE: | 850m = 2790' |
| D. Radar Settings: Radar resoultions will be 20 ns everywhere, 2048 stacks, with 80 microsecond records (except over ice stream B there will be 40 microsecond records). | |||||||||||||||||||||||||||||||||||||||||||||
| E. Radar Blanking: No radar blanking necessary. | |||||||||||||||||||||||||||||||||||||||||||||
| F. Radar Altimeter: Used at pilot's discretion. | |||||||||||||||||||||||||||||||||||||||||||||
| G. Extended Run-ins and Run-outs: 15.9 km run-ins and run-outs with explicit waypoints for all transects. | |||||||||||||||||||||||||||||||||||||||||||||
| H. Communication of Flight Plans: Designated Point of Contact between pilots and SOAR (either JLW or LVK). | |||||||||||||||||||||||||||||||||||||||||||||
| I. Flight Sequencing: Scheduled as weather permits. | |||||||||||||||||||||||||||||||||||||||||||||
| J. Flight Times: Flight windows have been established consistent with low magnetic noise periods. Flight windows at GMT: 0100-0700, 0700-1300, 1300-1700. | |||||||||||||||||||||||||||||||||||||||||||||
| K. Flight Planning Documents: Flight planning documents will be prepared by JLW or LVK and distributed to flight and ground crews prior to each filght. Copies of all flight plans are saved as part of SOAR flight logs. | |||||||||||||||||||||||||||||||||||||||||||||
| L. Reflight Criteria: Flights will occur 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. Reflights will take place during the remainder of the project. | |||||||||||||||||||||||||||||||||||||||||||||
| M. Weather Contingencies: Given bad weather, a single jump of 1000' can be made during a transect to avoid icing. Abort if clouds. | |||||||||||||||||||||||||||||||||||||||||||||
| N. Leap Second: n/a | |||||||||||||||||||||||||||||||||||||||||||||
| O. FOP/EDS interface: | |||||||||||||||||||||||||||||||||||||||||||||
| P. Gravity Ties: Gravity ties to be collected at MCM, SDM, NBY, then NBY, SDM, and back at MCM | |||||||||||||||||||||||||||||||||||||||||||||
| Q. Base Station Issues: NBY will be the base of operations. SDM. will serve as a secondary base station when required. | |||||||||||||||||||||||||||||||||||||||||||||
| 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. Determination if reflights are required will be made at that time. Science observers in the field may have acces to Quality Control products. | |||||||||||||||||||||||||||||||||||||||||||||
| S. GPS mask angle: 10°; if holes are introduced, decrease to 5º. | |||||||||||||||||||||||||||||||||||||||||||||
| T. PST Names: Names will incorporate our abbreviation for this project (LIV), the geographical location, and transect numbers. Names will look like: | |||||||||||||||||||||||||||||||||||||||||||||
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