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Project # 2006-503 T-REX

Terrain-induced Rotor EXperiment

Principal Investigator(s):   Vanda Grubišic´, et al.

NSF/NCAR Gulfstream-V (N677F)

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Data Quality Report (Low-Rate)

By Jørgen Jensen, Project Manager

20 October 2006

Acknowledgments:  The T-REX production data set for the NSF/NCAR GV was processed by Allen Schanot.   Much of the credit for generating the software and procedures should also go to Dick Friesen, Chris Webster and Al Cooper.   Teresa Campos, Ilana Pollack and Andy Weinheimer provided processed chemistry data (TDL water vapor, CO and ozone), and Pavel Romashkin processed the differential GPS data.  Ron Ruth directed me to issues with documentation that materially improved the data set, and many others within RAF provided invaluable help with instrument calibration.

Background:  T-REX was the first deployment of the NSF/NCAR GV research aircraft for which production data have been released.  The aircraft had been delivered to RAF about a year earlier, and much work had been done prior to T-REX in order to make the GV ready for deployment.  The vast majority of the instruments onboard the GV for T-REX functioned extremely well, but a few required special handling in generating the data for T-REX.

This summary has been written to outline basic instrumentation problems affecting the quality of the data set and is not intended to point out every bit of questionable data.  It is hoped that this information will facilitate use of the data as the research concentrates on specific flights and times.  The purpose is to serve as a guide for users unfamiliar with the GV sensors, variable names, etc.  In particular, the purposes of Section I are:

Section II lists isolated problems occurring on a flight-by-flight basis.  Documents describing the detail performance of the ACD ozone sensor and the EOL dropsonde system will be provided separately.  (See the In Situ Ozone page.)

Section I: General Discussion of Sensors and Measurements

Section II:   Flight-by-Flight Summary

Note:   All times listed below are Coordinated Universal Time (UTC).

RF01 (03/02/2006) RF02 (03/05/2006) RF03 (03/09/2006) RF04 (03/14/2006) RF05 (03/25/2006) RF06 (04/02/2006) RF07A (04/06/2006) RF07B (04/07/2006) RF08 (04/08/2006) RF09 (04/15/2006) RF10 (04/16/2006) RF11 (04/21/2006) RF12 (04/26/2006)
Last update: Mon Mar 12 23:50:53 GMT 2007