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Development of EPA Quality Assurance Guidance for Collection of Meteorological Data using Passive Radiometers

This document discusses the development of guidance by EPA for the collection of meteorological data using passive radiometers. It covers fundamentals, performance characteristics, monitoring goals, data processing, and recommendations for data collection.

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Development of EPA Quality Assurance Guidance for Collection of Meteorological Data using Passive Radiometers

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  1. Development of the USEPA Quality Assurance Guidance for the Collection of Meteorological Data Using Passive Radiometers Robert A. Baxter, CCM T&B Systems, Inc. Herman Wong Robert Elleman USEPARegion 10

  2. Overview • Background • Guidance development process • Contents • Completion of the document

  3. Background EPA meteorological guidance documents 2000 Meteorological Monitoring Guidance for Regulatory Modeling Applications Updating the “On-Site Guidance” 2008 Quality Assurance Handbook for Air Pollution Measurement Systems, Volume IV: Meteorological Measurements Provided updates to work performed by Lockhart and others detailing QA fundamentals and procedures Need for additional remote sensing instrumentation guidance

  4. Instrumentation Profiling radiometers Passive measurement technique Continuous measurement profiles Temperature, humidity and liquid water profiles

  5. Guidance Development Process Develop a first draft document based on principles in the existing documents Implement the draft guidance in a real-world application Observe the measurement and QAPP development process Observe the implementation of the guidance measurement and QA process Modify the guidance based on the observations Obtain a peer review of the final draft document Finalize the guidance document

  6. Document Contents Fundamentals Performance Characteristics Monitoring Goals and Objectives Siting and Exposure Installation and Acceptance Testing Quality Assurance and Quality Control Data Processing and Management Recommendations for Data Collection References

  7. Document Contents Fundamentals Performance Characteristics Monitoring Goals and Objectives Siting and Exposure Installation and Acceptance Testing Quality Assurance and Quality Control Data Processing and Management Recommendations for Data Collection References

  8. Document ContentsFundamentals Operation is based on the principle that all matter with a temperature other than absolute zero emits microwave radiation The spectrum and intensity is determined by the physical temperature and structure of the matter Temperature  50 – 60 GHz Oxygen absorption Specific frequency determines the effective volume of the measurement

  9. Document ContentsFundamentals Single Channel Elevation Scanning Multiple Channel

  10. Document ContentsFundamentals Scanning single channel

  11. Document ContentsFundamentals Scanning single channel

  12. Document ContentsFundamentals Scanning single channel

  13. Document ContentsFundamentals Scanning single channel

  14. Document ContentsFundamentals Scanning single channel

  15. Document ContentsFundamentals Scanning single channel

  16. Document ContentsFundamentals Scanning single channel

  17. Document ContentsFundamentals Scanning single channel

  18. Document ContentsFundamentals Scanning single channel

  19. Document ContentsFundamentals Scanning single channel

  20. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  21. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  22. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  23. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  24. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  25. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  26. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  27. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  28. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  29. Document ContentsFundamentals Multi-channel Sfc 1 7 2 3 4 5 6 Channel

  30. Quality Assurance and Quality Control Calibration methods System and performance audits Standard operating procedures Operational checks and preventive maintenance Corrective action and reporting

  31. Quality Assurance and Quality Control Calibration methods System and performance audits Standard operating procedures Operational checks and preventive maintenance Corrective action and reporting

  32. Performance Audits Not amenable to traditional “hands-on” type standards comparison Techniques for RASS Tethered sonde Radiosonde

  33. Performance Audits Not amenable to traditional “hands-on” type standards comparison Techniques for RASS Tethered sonde Radiosonde

  34. Performance Audits Not amenable to traditional “hands-on” type standards comparison Techniques for RASS Tethered sonde Radiosonde

  35. Performance Audits • Performance evaluation criteria • Quantifiable differences between the two systems • Assessment of the detection of significant inflections in the profiles • Assessment of the accuracy of the reported lapse rates • Assess the significance of the comparisons not meeting the suggested criteria

  36. Performance Audits

  37. Performance Audits

  38. Summary • Profiling radiometers provide a continuous measure of temperature profiles • The resulting data may not match what is obtained from a radiosonde • Important to understand if the differences are significant • Assess the value of continuous measurements versus infrequent or derived data from other sources • Given the above, the document provides guidance for users on the operation, quality assurance, quality control and data validation of information obtained from profiling radiometers

  39. Process Completion • Develop a first draft document based on principles in the existing documents • Implement the draft guidance in a real-world application • Observe the measurement and QAPP development process • Observe the implementation of the guidance measurement and QA process • Modify the guidance based on the observations • Obtain a peer review of the final draft document • Finalize the guidance document

  40. Process Completion • Develop a first draft document based on principles in the existing documents • Implement the draft guidance in a real-world application • Observe the measurement and QAPP development process • Observe the implementation of the guidance measurement and QA process • Modify the guidance based on the observations • Obtain a peer review of the final draft document • Finalize the guidance document

  41. Development of the USEPA Quality Assurance Guidance for the Collection of Meteorological Data Using Passive Radiometers Robert A. Baxter, CCM T&B Systems, Inc. Herman Wong Robert Elleman USEPARegion 10

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