1. GSN Quality Initiative GSN-QC Coordination Meeting IRIS DMC - 11/16/2011 GSN-QC Coordination Meeting IRIS DMC - 11/16/2011

2. Initiation - Significant issues with GSN dataset Lamont Waveform Quality Center identified key issues with GSN data Some metadata incomplete or incorrect Some Sensors showing signs of deterioration Some station issues unresolved for long time Problems and resolutions not clear to user community Lamont Waveform Quality Center identified key issues with GSN data Some metadata incomplete or incorrect Some Sensors showing signs of deterioration Some station issues unresolved for long time Problems and resolutions not clear to user community

3. IRIS Board Initiates GSN Quality Assessment GSN - Prepare a quality assessment strategy GSN - Convene a Quality Assessment Team (QAT) Board - appoint GSN Data Quality Panel GSN - Develop a GSN Quality webpage QAT - Assess current status of data quality, policies, procedures, and metrics across IRIS Panel - make recommendations for enhancing GSN data quality All - Implement Quality Assessment System GSN - Prepare a quality assessment strategy GSN - Convene a Quality Assessment Team (QAT) Board - appoint GSN Data Quality Panel GSN - Develop a GSN Quality webpage QAT - Assess current status of data quality, policies, procedures, and metrics across IRIS Panel - make recommendations for enhancing GSN data quality All - Implement Quality Assessment System

4. GSN Quality Webpage www.iris.edu/hq/programs/gsn/quality Describes quality initiative current quality status of GSN (interim) GSN upgrade progress www.iris.edu/hq/programs/gsn/quality Describes quality initiative current quality status of GSN (interim) GSN upgrade progress

5. Quality Assessment Team IRIS Anderson (chair) Ahern, Woodward, Busby, Fowler (Gridley) USGS Gee, Bolton, McNamara, Hutt, Storm, Ringler IDA Davis, Berger IRIS Anderson (chair) Ahern, Woodward, Busby, Fowler (Gridley) USGS Gee, Bolton, McNamara, Hutt, Storm, Ringler IDA Davis, Berger

6. QAT Mission Document current waveform quality on a station-by-station basis Review and correct, as necessary, metadata for all stations Identify sources of waveform quality problems (sensors, sites, systems) Review historical data to document and correct problems with metadata Assess current practices, policies and procedures Develop metrics and procedures for routine quality assessment Establish reporting mechanisms to communicate data quality Document current waveform quality on a station-by-station basis Review and correct, as necessary, metadata for all stations Identify sources of waveform quality problems (sensors, sites, systems) Review historical data to document and correct problems with metadata Assess current practices, policies and procedures Develop metrics and procedures for routine quality assessment Establish reporting mechanisms to communicate data quality

7. Panel Response Romanowicz, Lay, Kanamori, Ekström, Benz Technical Approaches of the QAT are sound GSN station certification is required Standardization of QC practices across GSN Metrics must feed into a management process Communications with User community Publicly available QC monitor Remediation plans on line two-way communication (feedback) Technical Approaches of the QAT are sound GSN station certification is required Standardization of QC practices across GSN Metrics must feed into a management process Communications with User community Publicly available QC monitor Remediation plans on line two-way communication (feedback)

8. Many Efforts Underway GSN (ASL and IDA) making adjustments to policies, procedures and practices of QA Continued work on NGS rollout and station calibration DMC efforts on MUSTANG and QC review need to all these efforts are coordinated GSN (ASL and IDA) making adjustments to policies, procedures and practices of QA Continued work on NGS rollout and station calibration DMC efforts on MUSTANG and QC review need to all these efforts are coordinated

9. For this meeting Reports from USGS, IDA, and DMC on QA initiatives underway What tools under development have pan-IRIS/USGS applications? Concepts of coordinated QA Implementation How can we best coordinate our efforts and share implementation? Some redundancies necessary, but how can we optimize? How can we share this across all IRIS programs? How do we move forward and continue this exchange? Reports from USGS, IDA, and DMC on QA initiatives underway What tools under development have pan-IRIS/USGS applications? Concepts of coordinated QA Implementation How can we best coordinate our efforts and share implementation? Some redundancies necessary, but how can we optimize? How can we share this across all IRIS programs? How do we move forward and continue this exchange?