SODAR calibration for turbulence profiling in TMT site testing

T. Travouillon

doi:10.1117/12.671549

23 June 2006 SODAR calibration for turbulence profiling in TMT site testing

T. Travouillon

Proceedings Volume 6267, Ground-based and Airborne Telescopes; 626720 (2006) https://doi.org/10.1117/12.671549
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

As part of the Thirty Meter Telescope (TMT) site testing program, several instruments have been deployed to characterize the turbulence profiles of the candidate sites. To make such measurements in the boundary layer (height < 1,000m) we have installed several SODARs. Initially conceived to make 3-dimensional wind speed profiles, this instrument is also capable of measuring the temperature fluctuation constant C²_T. Such a measurement requires calibration to become quantitative. We present in this paper a new calibration method that relies on additional kinetic heat flux measurements. This method is the first method to be fully portable to any other SODARs and does not rely on another turbulence profiler for cross calibration. This method will be used to calibrate all TMT SODAR data.

Citation Download Citation

T. Travouillon "SODAR calibration for turbulence profiling in TMT site testing", Proc. SPIE 6267, Ground-based and Airborne Telescopes, 626720 (23 June 2006); https://doi.org/10.1117/12.671549

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