Polarimetric Scatterometers

FMCW Polarimetric Scatterometers

This series of FMCW scatterometers, operating from 1 GHz to 18 GHz, are designed for near range measurement of the polarimetric response of natural surfaces, such as sea ice, sand, or snow.  These instruments measure normalized radar cross section (NRCS) and the target Mueller Matrix (alternately the covariance matrix) as a function of incidence angle.  Near field correction software allows calibrated measurements at ranges as close as 3 meters.

These instruments employ an embedded micro-computer that handles all processing tasks as well as hosting the system web page. The only connections required to operate the scatterometers are system power and Ethernet.

 

Specifications
  • Radar type: solid-state FMCW
  • Operating Frequency
    • L-band
    • S-band
    • C-band
    • X-band
    • Ku-band
  • Transmit bandwidth: 500 MHz
  • Transmit Power: less than 0.1 mW
  • Range: 3m-30m
  • Range resolution: 0.32 m (1.5 dB impulse response with Hanning window)
  • Azimuth coverage: +/-170 degrees
  • Elevation coverage: 15-180 degrees
Data Products
  • Target Mueller Matrix
  • Target Covariance Matrix
  • Normalized radar cross-section
  • Co-polarized correlation coefficient magnitude and phase
  • Scatter plots of instantaneous ellipse parameters
Data Product Example Data

Example data products

Normalized Radar Cross Section of crop land vs. elevation angle

NRCS_near_field_corr_June_3_2015_185830

Black Trace: VV; red trace: HH; dash traces: VH and HV

Magnitude Correlation Coefficient of crop land

correlation_coefficient

Correlation Coefficient Phase of crop land

correlation_coefficient

 

System Webpage

System web page for instrument control and real time data display

system_web_page