D Q R Report

DQRID : D021110.2

Start Date	Start Time	End Date	End Time	Data Quality Metric
11/07/2002	2029	11/07/2002	2239	Incorrect
11/07/2002	1429	11/07/2002	1629	Incorrect
11/07/2002	1730	11/07/2002	1930	Incorrect
11/07/2002	2331	11/08/2002	0131	Incorrect
11/07/2002	1130	11/07/2002	1316	Incorrect

Subject:	SGP/SONDE/B4 - Soundings contaminated by interference
DataStreams:	sgpqmemwrcolB4.c1, sgpsondewnpnB4.b1, sgplssondeB4.c1, sgpsondewnpnB4.a1
Description:	These five soundings, done in succession on 11/07/2002 as part of the SCM/IOP are contaminated by interference. I can't tell whether the problem has to do with improper tuning of the radiosondes, inadequate frequency separation among radiosondes launched from different locations, or some other operator problem. I suspect that there is an operator component to the difficulty because the surface pressure is given as an unreasonably low 896.6 hPa on the 1730 sounding and 886.1 hPa on the 2331 sounding. This may indicate that the ground station was locked another station's radiosonde rather than on the B4 radiosonde.
Suggestions:
Measurements:	sgpsondewnpnB4.b1: dp asc lat wspd alt tdry u_wind v_wind pres deg lon rh more sgplssondeB4.c1: rh alt lat lon pres tdry more sgpqmemwrcolB4.c1: integ_vap_sonde model_tbsky23 model_tmr31 model_tbsky31 max_height_sonde model_tmr23 more sgpsondewnpnB4.a1: tdry pres rh lon deg u_wind asc alt dp v_wind lat wspd more