GISMO Team Meeting

1
GISMO Team Meeting

• May 3, 2006
• Vexcel Corporation

2
Agenda

• May 3 draft agenda at Vexcel       0900  Project
  Status, Jezek       0915  Radar system status
  (Gogineni)       0945  Antenna Status and
  potential design modification (KU )       1000 
  Break       1015  Simulations work at Vexcel
  (Wu)       1045  Summary of recent P-3 project
  and P-3 status  (Wallops telecon)       1100  KU
  and JPL system and data integration (JPL/KU
  telecon)                          1130  Data
  formats for May 06 (Paden/Wu/JPL telecon)
        1200 Lunch       1300   Experiment
  summary for May 06 - Gogineni       1330  
  Confirm specifications for May 06 flight  - Jezek
        1400  Surface Based ice sounding SAR
  update (Paden)       1430   IPY Proposal for 07
  08 flights Jezek       1445   Refined science
  objectives for 07 and 08 flights  (Discussion)
        1515   Break       1530  Backscatter
  modeling status (reports from OSU and  KU)
        1545    updated milestone chart and
  discussion       1630 Adjourn

3
GISMO Project Status

• K. Jezek

4
Project Accomplishments

• Theoretical concept well defined
• Phase history simulations confirm theoretical
  predictions
• Radar design trade completed
• Scaling scaling study completed
• Radar system available for May 06 test flight in
  Greenland

5
Project Accomplishments

• 1 paper in press JGR Planets
• 1 paper in prep, TGARS
• 2 two written papers submitted to EUSAR, third
  paper to be presented

6
Year 1 Project Goals

• Science and Management (OSU) Convene Science
  Team conduct initial design review refine
  project plan compile information on ice
  dielectric properties and ice sheet physical
  properties such as surface roughness and slope.
  Prepare reports as required by NASA
• Radar Development (University of Kansas a)
  Design of new set of optimized antennas We will
  build a model structure and measure its
  electrical performance. We will identify and work
  with a contractor to build the antenna
  installation mounted under the wings and flight
  test it in collaboration with engineers at NASA
  Wallops. b) End-to-end simulation of the system
  including antennas.
• Algorithm Development Develop a motion
  compensation processor and a time-domain
  (back-propagation) IFSAR processor. Use legacy
  code from the GeoSAR and MOSS IIP projects.
  (JPL) b) Prototype first version of the
  interferogram filtering code (JPL) c) Modify
  simulation software and generate simulated IFSAR
  returns from basal and surface layers (Vexcel)
  and evaluate the filter performance on the
  simulated data.

7
Milestone Chart as of 1/2006
8
(No Transcript)
9
Year 2 Project Goals

• Radar Development Build sub-system and assemble
  the complete system. Perform laboratory tests
  using delay lines to document loop
  sensitivity,radar waveforms and impulse response.
• System Integration (KU, WFF, Aircraft Operator)
  a)Install the radar and navigational equipment on
  P-3 or similar aircraft and conduct flight tests
  over the ocean.
• Algorithm Development. Develop a strip IFSAR
  processor and compare against the results of the
  exact time-domain processor. Iterate the clutter
  removal algorithm based on experimental results
  (JPL). Develop software and apply software to
  process multiple 2-D complex SAR images
  coherently (Vexcel).
• Data acquistion and Analysis Field experiments
  over the ice sheet Finalize interferometric SAR
  processor and pre-processor and process data from
  first campaign (JPL). Extract basal topography
  from result.. Iterate interferometric filter
  design based on assessment of the results.
• Science and Management Participate in field
  measurements Conduct design and performance
  review assess quality of results in context of
  science requirements.

10
Some issues

• Annual reports
• Two-frequency operations (antennas)
• Band pass filter design
• Motion compensation
• Data formatting
• Airborne simulations (aircraft attitude study of
  tomography vs interferometry)
• Uncertainty of P-3 availability
• Backscatter sensitivity study
• Time domain processor
• In flight processor
• Project ends June 2008 impact on 2008 test
  flight

11
May 2006 Experiment Parameters

• K. Jezek

12
May 06 Experiment

• Twin otter flight from Thule Camp Century
  interior
• 150 MHz Radar
• 5 transmit and 5 receive elements (1 m spacing)
• 2 m baseline outbound
• Return flight offset 25 m to the south for larger
  baseline
• Maximum comfortable altitude
• Range window setting procedure????

13
May 06 flight route
14
GISMO Flights 07-08

• IPY Proposal Submitted to ROSES
• K. Jezek

15
IPY Flight Request
Campaign Aircraft Base Location Total Experiment Flight Hours Individual Flight Duration Elevation (ft) Equipment
May 2007 NASA P-3 Kangerlussuaq/Thule Greenland 50 5-7 hours 26,000 150 MHz 450 MHz U. Kansas Radar
May 2008 NASA P-3 Kangerlussuaq/Thule Greenland 50 5-7 hours 26,000 150 MHz 450 MHz U. Kansas Radar
16
IPY 07 and 08 Flights

• May 07 flights
• May 06 opportunity offset requirement for
  earlier tests
• Teaming with WFF is advantageous
• Offset some of the costs (transit)
• Relieves some of the personnel burden
• Increases Science Payoff
• May 08 Flights
• Lessons learned opporunity and more science

17
IPY Proposed Costs

• Transit Cost 42,000 (14 hours)
• Science Mission Cost 150,000 (50 hours)
• MPCs (Fuel surcharge, travel, fabrication, other
  MPCs) 89,794
• Total cost per year 281,794
• One time fabrication costs 50,000
• Total funds available in IIP Project 100,000
• TOTAL ESTIMATED COST FOR THIS PROPOSAL 513,588
• One time fabrication costs are for modifications
  to the existing antenna pods. Mod is to allow
  operation at both 150 and 450 MHz.
• Available monies should permit reduced May 07
  campaign independent of this propsoal

18
IPY Science Objectives 2007
Year Validation Objective IPY Science Objectives
2007 Verify fringe rate separation concept at 150/450 MHz Acquire bed topography and reflectivity data along line connecting Camp Century GISP/GRIP, NGRIP and proposed NEME deep borehole sites
2007 Compare signal strength at 150/450 MHz Investigate distribution of subglacial water across and along North East Ice Stream
2007 Verify clutter rejection concept over smooth and rough target areas
2007 Investigate tomography with close repeat tracks
2007 Investigate repeat pass (several day) InSAR
19
IPY Objectives 2008
2008 Verify modifications from 2007 lessons learned Bed topography and reflectivity along and across Jacobshavn Glacier to investigate controls on fast glacier flow
2008 Investigate one-year repeat pass interferometry by reflying a 2007 flight line Bed topography and reflectivity along a line from DYE-3 to GRIP/GISP deep borehole sites
2008 OSU cluster sites overflight