Overview of quality assurance for May 1996

Review of automated quality assurance runs for May 1996 by Mark Shafer:
May looked remarkably clean with
very few things not caught by QA.


PROBLEM SITES:
--------------

HINT SRAD       Readings went below -1 at night from May 1 (probably 
                beginning earlier) through May 20, generating numerous
                failure (3) flags.  It should not compromise the daytime
                readings.  Sensor was apparently replaced on May 20.

DURA PRES       Seemed to go a bit erratic on the 24th, but no other
                flags for the month.  Reason I would be concerned is
                that a trouble-ticket was eventually issued for it
                on June 8th.  It's probably ok to use with the QA
                flags applied, but may want to look closely even if
                flags are not indicated.

Users of these data should review the automatically generated
quality assurance files.

• -180.0 - +180.0(alt)
• accumulated rainfall since 00GMT except at 00 GMT, the number given is the total
  accumulation for the past 24 hours(prec_amt)
• vector average wind magnitude(wvec_10m)
• Time offset from base_time(time_offset)
• Retrieved pressure profile(pres)
• standard deviation of wind speed(wspd_sigma)
• average wind run (arithmetic average speed) at 10m(wspd_10m)
• vector average of wind direction measured at 10m(wdir_10m)
• air temperature at 1.5m(tdry_1_5m)
• base time in epoch(base_time)
• lon(lon)
• maximum 3-second wind speed within the 5-minute averaging period(wspd_max)
• average wind speed at 2m(wspd_2m)
• Relative Humidity (hybrid-b grid)(rh)
• air temperature at 9m(tdry_9m)
• solar radiation(srad)
• standard deviation of wind direction(wdir_sigma)
• North Latitude(lat)

• leaf wetness index, measurement of dew ranging from 0 (dry) to 100(wet)(leaf_ind)
• -180.0 - +180.0(alt)
• soil temperature at 5 cm beneath natural sod cover(tsoil5)
• 10 cm soil temp(tsoil10)
• soil temperature at 5 cm beneath bare soil(tbare5)
• Average battery voltage(vbat)
• base time in epoch(base_time)
• lon(lon)
• soil temperature at 10cm beneath bare soil(tbare10)
• soil temperature at 30 cm beneath bare soil(tbare30)
• Time offset from base_time(time_offset)
• North Latitude(lat)