ecosar science igarss11 presentation.pdf
TRANSCRIPT
![Page 1: EcoSAR Science IGARSS11 Presentation.pdf](https://reader034.vdocument.in/reader034/viewer/2022052600/55764275d8b42ac31b8b4a43/html5/thumbnails/1.jpg)
GSFC ScienceTemilola Fatoyinbo
Jon RansonGuoqing Sun
GSFC EngineeringRafael Rincon
Manohar DeshpandeMartin Perrine
Quenton BondsMatthew Mclinden
External PartnersRichard Hale (University of Kansas)
Intelligence Automation Inc.
ECOSARTHE FIRST P- BAND DIGITAL BEAMFORMING POLARIMETRIC INTERFEROMETRIC SAR
INSTRUMENT TO MEASURE ECOSYSTEM STRUCTURE, BIOMASS, AND SURFACE WATER
ESTO-IIP 2011-2014
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ECOSAR SYSTEM DESCRIPTION
P-band Digital Beamforming Polarimetric Interferometric SAR:• Dual Antennas with 25 m baseline • Center frequency of 435 MHz (69 cm wavelength) • Range resolution (8 m – 44 m) • High resolution science mode (1.3 m)• Polarization HH, VV, HV, VH• Digital Beamforming
EcoSAR will fly on the NASA P3 airplane based at Wallops Flight Facility
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MAIN SCIENCE OBJECTIVES
EcoSAR instrument will quantify:• Biomass (up to 200 Mg/ha from Polarimetric SAR)• Canopy and Surface Height ( 1m accuracy from PolInSAR)• Ecosystem structure and extent (range resolution of 1.3 m)• Disturbance and recovery
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SCIENCE OBJECTIVES
• These measurements are crucial for future SAR mission validation (DesdynI, BIOMASS, Tandem-L)
• Improved Carbon and forest structure estimates will support international C reduction initiatives (REDD+)
• How are the Earth's carbon cycle and ecosystems changing, and what are the consequences for the Earth's carbon budget, ecosystem sustainability, and biodiversity?
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WHY P-BAND
• Longer wavelengths (L- and P- band) are able to penetrate the canopy and are scattered by larger components, such as the trunk and the ground and thereby increase the returned signal.
P-Band (HH,HV,VV)Dark areas in this image are recent disturbance from logging.
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0
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Fiel
d S
tem
Bio
mas
s (to
ns/h
a)SAR Predicted Stem Biomass
P-band AlgorithmR=0.954
Saatchi & Moghaddam 2000
P-Band (HH,HV,VV) L-Band (HH,HV,VV) C-Band (HH,HV,VV)
P-Band Estimated Forest Stem Biomass vs Field measurements in Boreal Forests (R2 = 0.9)
Saatchi & Moghaddam, 2000P-Band SAR Measures Boreal & temperate Forest Biomass up to 200 Mg/ha with ±10% Accuracy
P-Band Measurements of Boreal & Temperate Forest Biomass
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(HH, HV, VV)
AirSAR P-Band SAR Measurement of Tropical Forest Disturbance and Aboveground Biomass
AirSAR P-band Image (1993) Manu National Park, Peru
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HH
HV
Pol-InSAR height measurements: • Polarization is sensitive to scattering
mechanisms with different interferometricscattering phase centers
• EcoSAR will allow us to separate ground signal from canopy signal and derive canopy height.
HV scattering phase center
HH scattering phase center
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Height (m)
Example of SAR and InSARusing DBSAR (L-band) measurements
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EcoSAR Concept
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EcoSAR + DBSAR
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Schedule and MilestonesYear 1
Definition of the EcoSAR science and system and requirements
Antenna Arrays Design and fabrication
Radar Electronics Unit Design and fabrication
Year 2
Completion of Waveform generator/data system
Testing and programming of waveform generator/data system
Radar Electronics evaluation, testing and initial assembly.
Full system integration and testing in laboratory and in anechoic chamber.
Year 3
Installation and test flight operation of the system on the NASA P-3 aircraft
Validation of EcoSAR test flight data sets
Field Campaign 1 New Hampshire and Maine
Field Campaign 2 Costa Rica
Science Retrievals from EcoSAR campaigns
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FIELD CAMPAIGNS
New England Summer 2013 Costa Rica Winter 2014
+ Wallops & SERC
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CURRENT STATUS
• Successfully completed the design of prototype dual polarized wideband P-band antenna element.
• Simulations of Full array performance is underway.
• Preliminary Aerodynamic analysis on antenna structure has been performed.
• Several radar transceiver designs have been formulated and evaluated. Components specifications and availability are being investigated.
• Waiting for contract to IAI to begin processor development.