1. VOCALS NSF C-130 Data Assessment Report

2. Resources Project Documentation: www.eol.ucar.edu (RAF – Field Projects) Project Documentation: www.eol.ucar.edu (RAF – Field Projects) www.eol.ucar.edu –Allen Schanot: schanot@ucar.edu schanot@ucar.edu Data Access: www.eol.ucar.edu (RAF – Data Access) Data Access: www.eol.ucar.edu (RAF – Data Access) www.eol.ucar.edu –Janine Goldstein: janine@ucar.edu janine@ucar.edu Analysis Tools: www.eol.ucar.edu (RAF – Software) Analysis Tools: www.eol.ucar.edu (RAF – Software) www.eol.ucar.edu –Chris Webster: cjw@ucar.edu

3. New Data Release archived 6/25/09 No Changes to state, dynamic or No Changes to state, dynamic or thermodynamic variables thermodynamic variables Updated CDP bin sizes & concentration Updated CDP bin sizes & concentration Updated PCASP bin sizes & concentration Updated PCASP bin sizes & concentration Updated FSSP concentration Updated FSSP concentration Special 2DC processing Special 2DC processing Updated O3 & CO concentrations Updated O3 & CO concentrations

4. Position, Ground Speed & Winds Position, Ground Speed & Winds DGPS – most accurate DGPS – most accurate –Unusually noisy signal due to interference –Separate data set IRS – Schuler oscillation IRS – Schuler oscillation Novatel GPS – Used as reference Novatel GPS – Used as reference Winds – Winds – –Use GPS corrected (WSC, WDC, etc) –IRS version for comparison (WS, WD, etc)

5. Reference Altitude (ALTX) GPS Altitude: variable satellite coverage GPS Altitude: variable satellite coverage –Data gaps Pressure Altitude: non-std lapse rate Pressure Altitude: non-std lapse rate –Constant surface pressure (1013.15) DGPS most accurate but noisy this case DGPS most accurate but noisy this case Used Radar Altimeter Data as reference Used Radar Altimeter Data as reference –Accuracy decreases with increased altitude

6. Reference Temperature (ATX) Reference Temperature (ATX) OPHIR-III: less accurate / slower OPHIR-III: less accurate / slower –In cloud as needed or at exit Heated Rosemount: less accurate / slower Heated Rosemount: less accurate / slower Used Unheated Rosemount Used Unheated Rosemount –Minimal wetting in cloud –Fast enough for heat flux calculations

7. Reference Humidity (PI Choice) Chilled mirror most accurate Chilled mirror most accurate –Slow (variable response tied to Td depression) –Overshooting at cloud boundaries UV Hygrometer used in derived variables UV Hygrometer used in derived variables –Fast / suitable for moisture flux calculations –Flt-by-flt calibration against chilled mirror sensor –Some residual in flight drift (some unsat. Cloud legs) –Loss of accuracy at high altitude

8. Surface Temperature (TSURF) Surface Temperature (TSURF) Derived from radiometric measurement RSTB Derived from radiometric measurement RSTB Adjusted for altitude based on mean PBL humidity Adjusted for altitude based on mean PBL humidity Not valid for cloud top temperatures due to unknown altitude separation. Use RSTB. Not valid for cloud top temperatures due to unknown altitude separation. Use RSTB.

9. CDP Cloud Droplet Data Optical window heater failure led to mid project change in probe calibration (rf04 / rf06) Optical window heater failure led to mid project change in probe calibration (rf04 / rf06) Switched to 2 stage bin size calibration Switched to 2 stage bin size calibration Bin shift checked with flt-by-flt pollen test Bin shift checked with flt-by-flt pollen test Data updated in June release to archive Data updated in June release to archive

10. PCASP Aerosol Data PCASP Aerosol Data Collaborated with Univ. of Wyoming on bin sizing and sample flow calibration Collaborated with Univ. of Wyoming on bin sizing and sample flow calibration Bin 1 data removed from concentration total due to excessive noise. Bin 1 data removed from concentration total due to excessive noise. Data updated in June release to archive Data updated in June release to archive

11. 2DC Precipitation Data 2DC Precipitation Data

12. RAF FSSP-100 Cloud Probe Data Probe modified to reduce droplet shattering Probe modified to reduce droplet shattering –Excessive noise in smallest bins –First bin 6 or 8 in CONCF calculation –Raw data matrixes intact Probe changed to std model between rf10 & rf11 Probe changed to std model between rf10 & rf11 –Noise reduced to normal –First bin 2 in CONCF calculation

13. User Supplied Data User Supplied Data Drexel SO2 & DMS – merged Drexel SO2 & DMS – merged RAF Chemistry (O3 & CO) – updated to final product RAF Chemistry (O3 & CO) – updated to final product CVI – updated to final product CVI – updated to final product Wyoming CN – updated to final product Wyoming CN – updated to final product Wyoming CCN - products separate in archive Wyoming CCN - products separate in archive Hawaii CN – preliminary / final products separate in archive Hawaii CN – preliminary / final products separate in archive Hawaii non-CN aerosols - products separate in archive Hawaii non-CN aerosols - products separate in archive Fast FSSP - products separate in archive Fast FSSP - products separate in archive WCR & WCL - products separate in archive WCR & WCL - products separate in archive Microwave Radiometer - products separate in archive Microwave Radiometer - products separate in archive RAF GNI – products separate in archive RAF GNI – products separate in archive