RS80 Correction Factor

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RS-80 Correction Factor
Amy Bleidorn OC3570 September 7, 2007
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Data Collection

• JAN and JUL 2007, RV Point Sur

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RS-92 upgrades

• Better GPS
• HUMICAP / Calibration
• Pulse Heating

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Sonde Comparisons
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Sonde Comparisons
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Sonde Comparisons
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Sonde Comparisons
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Other research
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SO WHAT????
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Refractivity calculations
Duct size/gradient has direct effect on frequency
propagation
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Sonde Comparisons
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Sonde Comparisons
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Sonde Comparisons
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Sonde Comparisons
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Correction factors

• 25 Jan
• down
• G A-1.15 B2.5
• L A-1.04 B7
• up
• G A-1.15 B2.5
• L A-1.08 B2
• 21 Jul
• down
• G A-1.15 B2.5
• L A-1.13 B2
• up
• G A-1.14 B4
• L A-1.13 B2
• Best fit slope -1.1 intercept 2

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Viasala testing
Linear relationship!
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Other research
RS-80 Corrected 85 95.7 90 101.2
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Sonde Comparisons
July 2007 data 20 Radiosonde launches on
cloudy/foggy days Max RH measured by
Sonde type within the cloud
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Further investigation

• Long term records correction / documentation
• Outliers !!
• Equipment to launch simultaneously
• Will it change AREPS profiles at 5.8GHz?
• (my thesis)

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References

• Eighth Symposium on Integrated Observing and
  Assimilation Systems for Atmosphere, Oceans, and
  Land Surface http//ams.confex.com/ams/pdfpapers/7
  2134.pdf
• New Vaisala Radiosonde RS92 Testing and Results
  from the Field
• Jon Währn, Ilkka Rekikoski, Hannu Jauhiainen,
  Jaakko Hirvensalo
• Vaisala Oyj
• World Meteorological Organization Technical
  Conference on Meteorological and Environmental
  Instruments and Methods of Observation TECO
  2005
• http//www.wmo.ch/pages/prog/www/IMOP/publications
  /IOM-82-TECO_2005/Programme_index.html
• Results of the RS92 Acceptance Test performed by
  the Met Office (UK)
• Richard Smout, John Nash, Tim Hewison Mark
  Smees

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Questions???
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Go Navy! Beat Rutgers!