SGP/SONDE/C1 - Temperature/RH incorrect

The temperature throughout this sounding is too high and as a result the RH values will be 
incorrect as well.  I'm not sure what is wrong here but the operators noted reasonable 
values (18.1 degC, 87%) in the log before launch.  Review of the raw data, however, shows 
the sonde reporting temperatures nearly 20 degC higher.  I suppose it is possible that 
the operator entered into the log the reference temperature from the GC25 ground check set 
rather than the temperature reported by the sonde - I can't think of any other 
explanation - there is no doubt that the temperature sensor on this sonde was bad.

• Surface dew point temperature(dp)
• Dry-Bulb Temperature(tdry)
• Relative humidity scaled, by total column amount from MWR(rh)

• Relative humidity scaled, by total column amount from MWR(rh)
• Dry-Bulb Temperature(tdry)

SGP/SONDE/C1 - Bad RH Data

The RH values during this sounding oscillate between reasonable values and near-zero 
values.  The oscillation is due to failure of the RH sensor heating process.

• Surface dew point temperature(dp)
• Relative humidity scaled, by total column amount from MWR(rh)

SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondes

Because of a manufacturer's production problem, we will be using both RS92-SGP (GPS 
windfinding and RS92-KL (Loran windfinding) radiosondes at the SGP/CF starting February 10, 
2006.  The radiosonde type used for the each sounding may be determined by looking the 
metadata variable "launch_status" in the netCDF data files.

• east longitude for all the input platforms.(lon)
• model zonal wind velocity(u_wind)
• surface wind speed(wspd)
• model meridional wind velocity(v_wind)
• north latitude for all the input platforms.(lat)
• Wind Direction(deg)
• Wind Status(wstat)

SGP/SONDE/C1 - Soundings done as part of dual-sonde flights

The following soundings done during the subject time period were flown in dual-sonde mode 
in which the standard ARM RS92 radiosonde was attached to the same balloon with a NASA 
ATR (atmospheric temperature reference) radiosonde.  The radiosondes were separated by a 6' 
styrofoam bar.  To accommodate the additional weight, we used 1200g balloons rather than 
350g balloons.  Accordingly, we want to alert users that these soundings may reach 
higher altitudes than normal for ARM soundings and that the ascent rate may be somewhat 
higher.  The following soundings are affected:

Sequence  Date    UTC launch time
    1     2/22        0530
    2     2/22        1730
    3     2/22        2330 <---- No data: launch failure    
    4     2/23        0230
    5     2/23        0530
    6     2/23        1730    
    7     2/23        2030
    8     2/23        2330
    9     2/24        2330
   10     2/25        0215
   11     2/25        0509    
   12     2/25        1730
   13     2/25        1930
   14     2/25        2300

• Surface dew point temperature(dp)
• Time offset from base_time(base_time)
• surface wind speed(wspd)
• model zonal wind velocity(u_wind)
• Relative humidity scaled, by total column amount from MWR(rh)
• north latitude for all the input platforms.(lat)
• Ascent Rate(asc)
• pressure at constant pressure surface(pres)
• Wind Direction(deg)
• Wind Status(wstat)
• east longitude for all the input platforms.(lon)
• Dry-Bulb Temperature(tdry)
• Time offset of tweaks from base_time(time_offset)
• model meridional wind velocity(v_wind)
• altitude above sea levelaltunits(alt)

SGP/SONDE/C1 - No Wind/Lat/Lon Data in Sonde Files

The wind finding hardware failed so that no wind or latitude/longitude data was collected 
on the launches for these days.

• east longitude for all the input platforms.(lon)
• model zonal wind velocity(u_wind)
• surface wind speed(wspd)
• model meridional wind velocity(v_wind)
• north latitude for all the input platforms.(lat)
• Wind Status(wstat)