development of the usepa quality assurance guidance for the collection of meteorological data using...
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2011 National Air Quality Conferences March 7 - 10, 2011
Development of the USEPA Quality Assurance Guidance for the
Collection of Meteorological Data Using Passive Radiometers
Robert A. Baxter, CCMT&B Systems, Inc.
Herman WongRobert Elleman
USEPARegion 10
2011 National Air Quality Conferences March 7 - 10, 2011
Overview
• Background
• Guidance development process
• Contents
• Completion of the document
2011 National Air Quality Conferences March 7 - 10, 2011
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
2011 National Air Quality Conferences March 7 - 10, 2011
Instrumentation
• Profiling radiometers– Passive measurement technique
– Continuous measurement profiles
– Temperature, humidity and liquid water profiles
2011 National Air Quality Conferences March 7 - 10, 2011
Guidance Development Process
1. Develop a first draft document based on principles in the existing documents
2. Implement the draft guidance in a real-world application
3. Observe the measurement and QAPP development process
4. Observe the implementation of the guidance measurement and QA process
5. Modify the guidance based on the observations
6. Obtain a peer review of the final draft document
7. Finalize the guidance document
2011 National Air Quality Conferences March 7 - 10, 2011
Document Contents
1. Fundamentals
2. Performance Characteristics
3. Monitoring Goals and Objectives
4. Siting and Exposure
5. Installation and Acceptance Testing
6. Quality Assurance and Quality Control
7. Data Processing and Management
8. Recommendations for Data Collection
9. References
2011 National Air Quality Conferences March 7 - 10, 2011
Document Contents
1. Fundamentals
2. Performance Characteristics
3. Monitoring Goals and Objectives
4. Siting and Exposure
5. Installation and Acceptance Testing
6. Quality Assurance and Quality Control
7. Data Processing and Management
8. Recommendations for Data Collection
9. References
2011 National Air Quality Conferences March 7 - 10, 2011
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
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Single ChannelElevation Scanning
Multiple Channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Scanning single channel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Document ContentsFundamentals
Multi-channel
1 5 6 72 3 4 SfcChannel
2011 National Air Quality Conferences March 7 - 10, 2011
Quality Assurance and Quality Control
• Calibration methods
• System and performance audits
• Standard operating procedures
• Operational checks and preventive maintenance
• Corrective action and reporting
2011 National Air Quality Conferences March 7 - 10, 2011
Quality Assurance and Quality Control
• Calibration methods
• System and performance audits
• Standard operating procedures
• Operational checks and preventive maintenance
• Corrective action and reporting
2011 National Air Quality Conferences March 7 - 10, 2011
Performance Audits
• Not amenable to traditional “hands-on” type standards comparison
• Techniques for RASS– Tethered sonde
– Radiosonde
2011 National Air Quality Conferences March 7 - 10, 2011
Performance Audits
• Not amenable to traditional “hands-on” type standards comparison
• Techniques for RASS– Tethered sonde
– Radiosonde
2011 National Air Quality Conferences March 7 - 10, 2011
Performance Audits
• Not amenable to traditional “hands-on” type standards comparison
• Techniques for RASS– Tethered sonde
– Radiosonde
2011 National Air Quality Conferences March 7 - 10, 2011
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
2011 National Air Quality Conferences March 7 - 10, 2011
Performance Audits
2011 National Air Quality Conferences March 7 - 10, 2011
Performance Audits
2011 National Air Quality Conferences March 7 - 10, 2011
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
2011 National Air Quality Conferences March 7 - 10, 2011
Process Completion
1. Develop a first draft document based on principles in the existing documents
2. Implement the draft guidance in a real-world application
3. Observe the measurement and QAPP development process
4. Observe the implementation of the guidance measurement and QA process
5. Modify the guidance based on the observations
6. Obtain a peer review of the final draft document
7. Finalize the guidance document
2011 National Air Quality Conferences March 7 - 10, 2011
Process Completion
1. Develop a first draft document based on principles in the existing documents
2. Implement the draft guidance in a real-world application
3. Observe the measurement and QAPP development process
4. Observe the implementation of the guidance measurement and QA process
5. Modify the guidance based on the observations
6. Obtain a peer review of the final draft document
7. Finalize the guidance document
2011 National Air Quality Conferences March 7 - 10, 2011
Development of the USEPA Quality Assurance Guidance for the
Collection of Meteorological Data Using Passive Radiometers
Robert A. Baxter, CCMT&B Systems, Inc.
Herman WongRobert Elleman
USEPARegion 10
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