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Revised Solar Radiation Correction Table RSN2010 for RS92 Temperature Sensor

  • ​Small changes for Vaisala Radiosonde RS92 solar radiation correction table have been made. In addition solar radiation correction algorithm takes now into account radiosonde ventilation during the flight
  • The new correction table was used in the WMO Radiosonde Intercomparison, Yangjiang, China, July 2010.
Temperature sensor solar radiation correction table RSN2010


NOTES:

  • RS92 solar radiation correction table RSN2010 for DigiCORA® Sounding Software version 3.64
  • The correction values in the table are as a function of pressure and sun elevation angle. Actual correction takes into account radiosonde ventilation in flight, presented table values are calculated for typical 5 m/s ventilation.
  • The corrections are subtracted from the measured temperature.

    Temperature sensor solar radiation difference table RSN2010 - RSN2005

Sounding series statistics example: day time, tropical

Daytime differences with standard deviations between new and old calculation (RSN2005). Statistics of day time flights in tropical conditions, 20 flights.

Blue = new calculation
Reference line = old calculation
Average ascent rate 5.3 m/s, std 0.4 m/s. Single soundings, length of string 30 meters.

Sounding series statistics example, night time, high latitude

Night time differences with standard deviations between new and old calculation (RSN2005). Statistics of day time flights in high latitude conditions, 30 flights

Blue = new calculation
Reference line = old calculation
Average ascent rate 5.2 m/s, std 0.2 m/s. Single soundings, length of string 30 meters.

  • Flight reproducibility test verifies the agreement between similar type of radiosondes when measuring the same atmospheric conditions. Test proves that reproducibility remains at good level. 

Reproducibility in sounding






 

 

 

 






Twin sounding differences with standard deviations using new calculation, high latitude conditions,
25 flights.
Average ascent rate of soundings is 5.3 m/s, stdev between soundings is 0.3 m/s. Length of balloon string is 50 meters.