Project #1999-803 MAP

Mesoscale Alpine Programme

Kuettner, et al.

NSF/NCAR L-188 Electra (N308D)

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Summary of Calibration Factors

* Differences between the Pre- and Post-Calibrations were generally within acceptable levels, thus indicating generally stable response. Except for the channels indicated, Pre-Project calibrations have been used in the final data processing.

+ Certain sensors had to be replaced during the course of the experiment. Post Calibration coefficients were used from the point of the exchange to the end of the project.

Calibration Manuevers 08/25/1999, 10/02/1999

RAF uses sets of in-flight maneuvers specifically designed to help evaluate the performance of the 3-D wind measurement system on the aircraft. Complete sets of maneuvers were flown on one early test flight (TF01) and one short research flight. A partial set of maneuvers was also conducted on flight RF09. In each case the variations observed fell within acceptable limits.

PMS-1D Probe Bin Sizes

The PCASP, FSSP1-00, and 260X 1-D probes were used on the project. The 260X probe provides measurements for 64 bins of 10 micrometers each. Due to airspeed limits on the probe response, however, calculations of 260X particle concentrations are limited to bin 5 and above (>50 µm). Listed below is the minimum droplet diameter (micrometers) of each sampling bin for the other two probes along with the upper limit for bin #15.