NSA/SONDE/C1 - This is a test sounding done using an RS80H radiosonde

This was a sounding done using an RS80H radiosonde to test a special operational 
procedure.  There is nothing wrong with the data, though users should be aware that the sounding 
was not done using the current ARM standard RS90 radiosonde.

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

NSA/SONDE/C1 - Test sounding using RS80H

This is a test sounding done using an old RS80H radiosonde rather than the production RS90 
version.  Although the sonde functioned normally, the RH data may be subject to a dry 
bias caused by the age of the sensor and possible contamination.

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

NSA/SONDE/C1 - Incorrect surface altitude

The value of the station altitude (relative to mean sea level) is
incorrect in all NSA radiosonde files prior to 2/14/2004.  The correct
value is 8 m.  The incorrect value can be different.  Prior to 4/24/2002
(in platform nsaisssonde...) it was given as 12 m.  From 4/24/2002 to
2/13/2004 (in platform nsasondewnpn...) it is almost always given as
27 m (sometimes [rarely] 17 m).

• altitude above sea levelaltunits(alt)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

NSA/SONDE/C1 - Bad temperature

Because of strong winds, the radiosonde hit the ground after launch and the temperature 
sensor broke.  The RH and pressure data also should be considered suspect.

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

NSA/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry

The output precision of the following variables was increased 20060929:

   alt	changed from 1m to 0.1m
   dp	changed from 0.1degC to 0.01degC
   pres changed from 0.1 hPa to 0.01 hPa
   RH	changed from 1%RH to 0.01%RH
   tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase
in accuracy.  Users are cautioned to continue to use their best scientific
judgement when using these or any other data.

• Relative humidity scaled, by total column amount from MWR(rh)
• Dry-Bulb Temperature(tdry)
• altitude above sea levelaltunits(alt)
• pressure at constant pressure surface(pres)
• Surface dew point temperature(dp)