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Reflectivity Calibration of Cazadero Precipitation Profiler (SPROF) Comparisons with KDAX, KMUX and CZC JWD. 1998, 2001-2007 and 2008-2012 Seasons. Approach. KDAX
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Reflectivity Calibration of Cazadero Precipitation Profiler (SPROF)Comparisons with KDAX, KMUX and CZC JWD 1998, 2001-2007 and 2008-2012 Seasons
Approach • KDAX • Extracted value of reflectivity over CZC from the 1.5o or 1.3o tilt of KDAX, depending on VCP in use (0.5o tilt is blocked by terrain). Sometimes the actual elevation angle of the beam over CZC differed from the fixed angle by 0.1o-0.2o. • Calculated Gaussian-weighted mean of SPROF reflectivity over the vertical extent of KDAX beam as defined by the actual elevation angle of the beam. (1.5o is ~3.5-5.7 km MSL and 1.3o is ~3.0-5.2 km MSL) • Paired observations closest in time to each other • KMUX • Same as KDAX, but using 0.5o beam (0.5o is ~3.5-6.8 km MSL) • JWD • Calculated reflectivity from dead-time-corrected JWD DSD averaged over 2 minutes. • Extracted SPROF gate 2 reflectivity and averaged over corresponding JWD 2-minute sampling period.
Cases used for calibration (1) • 1997-1998 season (no disdrometer data) • 1/29/98 06-10 UTC • 2/14/98 03-11 UTC • 3/12/98 13-23 UTC • 2000-2001 season (no disdrometer, no KDAX data) • 1/23/01 16-22 UTC • 3/4/01 12-16 UTC • 2001-2002 season (no disdrometer, no KMUX data) • 1/1/02 04-05, 07-08, 13-15 UTC • 2/17/02 00-03 UTC • 3/10/02 02-08 UTC
Cases used for calibration (2) • 2002-2003 season (no KMUX data) • 12/14/02 00-02 UTC (no disdrometer data) • 12/27/02 09-12 UTC (no disdrometer data) • 12/28/02 20-24 UTC (no disdrometer data) • 1/2/03 13-20 UTC (no disdrometer data) • 3/15/03 01-07 UTC (disdrometer data) • 2003-2004 season (SPROF saturated after ~12/28/03) • 12/13/03 00-06 UTC (disdrometer data but no sfcmet data) • 1/1/04 02-13 UTC (disdrometer data but SPROF saturated) • 2/25/04 04-12 UTC (disdrometer data but SPROF saturated)
Cases used for calibration (3) • 2004-2005 season • 12/8/04 00-13 UTC (no disdrometer data) • 1/26/05 02-06 UTC (disdrometer data) • 2/21/05 00-09 UTC (disdrometer data) • 3/21-22/05 16-02 UTC (disdrometer data) • 2005-2006 season • 12/1-2/05 22-04 UTC (disdrometer data) • 12/31/05 00-12 UTC (disdrometer data) • 2/27-28/06 20-01 UTC (disdrometer data) • 3/5/06 10-20 UTC (disdrometer data) • 4/12/06 05-20 UTC (disdrometer data)
Cases used for calibration (4) • 2006-2007 season • 12/21/06 15-21 UTC (no disdrometer data) • 2/8-9/07 18-02 UTC (disdrometer data) • 4/21-22/07 18-04 UTC (no disdrometer data) • 2007-2008 season (SPROF data needs to processed) • 2008-2009 season (RFI in SPROF data) • 12/21/08 13-18 UTC (disdrometer data) • 2/16/09 04-10 UTC (disdrometer data) • 5/2/09 14-18 UTC (disdrometer data) • 2009-2010 season (RFI in SPROF data) • 1/20/10 10-17 UTC (disdrometer data, malfunctioning?) • 4/4/10 15-22 UTC (no disdrometer data)
Cases used for calibration (5) • 2010-2011 season (RFI in SPROF data) • 12/3/10 01-08 UTC (disdrometer data) • 3/6/11 01-10 UTC (disdrometer data) • 2011-2012 season (RFI in SPROF data) • 11/24/11 02-11 UTC (disdrometer data) • 2/7/12 07-13 UTC (disdrometer data) • 3/13/12 11-19 UTC (disdrometer data)