D Q R Report

DQRID : D070407.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
12/01/2006	0000	05/15/2007	0100	Suspect

Subject:	TWP/MPL/C3 - False cloud detection at 15-20km
DataStreams:	twpmplpolavgC3.s1, twpmplpolC3.b1, twpmplsmask1clothC3.c1, twpmplpolavgC3.c1
Description:	During the period specified, clouds were sometimes incorrectly detected at 15-20km. These artifacts were seen as quasi-stationary layers that were clearly not atmospheric in origin. A replacement instrument was installed in May 2007 to correct the problem.
Suggestions:	Ignore data above 15 km range
Measurements:	twpmplpolavgC3.c1: signal_return_cross_pol signal_return_co_pol preliminary_cbh_co_pol preliminary_cbh_cross_pol more twpmplpolavgC3.s1: preliminary_cbh_co_pol signal_return_co_pol preliminary_cbh_cross_pol signal_return_cross_pol more twpmplsmask1clothC3.c1: Heights more twpmplpolC3.b1: preliminary_cbh signal_return more