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Work Package 2 – Overview of instrumentation, data gathering and calibration issues Calibration of the Galileo 94GHz radar – two years of data Nicolas.

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Presentation on theme: "Work Package 2 – Overview of instrumentation, data gathering and calibration issues Calibration of the Galileo 94GHz radar – two years of data Nicolas."— Presentation transcript:

1 Work Package 2 – Overview of instrumentation, data gathering and calibration issues Calibration of the Galileo 94GHz radar – two years of data Nicolas Gaussiat and Robin Hogan Progress meeting 3 –Reading – 24-25 Oct 2002

2 Calibration technique (Robin et al. paper) Radome attenuation Calibrated Uncalibrated 8 dBZ Zcal

3 Calibration results Calibration constant to be added to the raw data (+/- 1dB) 3 data acquisition systems working together Robin’s calibration by comparing with 3 GHz radar nicely confirmed From May 1999 to March 2002

4 Coherent processing : toward more accuracy ? 1 sec average 30 sec average

5 Identified problem : Noise subtraction vs. peak detection Measured signal power ~ True signal power Measured signal power << True signal power

6 Data availability http://www.met.reading.ac.uk/radar/cloudnet/data/ Covering period : March 2001 – March 2002 Monthly.tar.gz files : Coherent processing: YYYYMM_chilbolton-galileo.tar.gz Incoherent processing: YYYYMM_chilbolton-galileo_i.tar.gz

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