1. Quality Assurance of Real-Time Data February 2004 C OASTAL D ATA I NFORMATION P ROGRAM C OASTAL D ATA I NFORMATION P ROGRAM 1975 - present

2. Nowcast Model Products Real-Time Web Products Southern California Summary Map

3. 1995: Wave Data Standards Analysis – US Army Corps of Engineers “… provide specifications on the analysis techniques that must be applied to wave data ….to ensure quality and uniformity of the final product. … The standard has evolved through a consensual approach involving the principal organizations which are responsible for the vast majority of wave measurements for this country. “ 2003: Handbook of Automated Data Quality Control Checks and Procedure of the National Data Buoy Center

4. QUALITY ASSURANCE Pressure Sensor Calibration DEEP TANK Soak complete package (sensors & cable) – Establish noise floor COLD BOX Constant Temperature Standard Paros Battery of statistical test of dynamic pressure responses over several weeks to establish noise floor.

5. Generated from Aceh, Indonesia earthquake on Dec 26, 2005 @ 00:59UTC.

6. Quality Control Specifications Pressure Sensors: Time Domain Max Wave Height Test Flat episodes Test Spike Test Max value Test: successive trough to crest Min Value Test: successive trough to crest Mean Shift Test Equal Peaks Test Acceleration Test Mean crossing Test Period Distribution Test

7. Quality Control Specifications Wave Buoys: Frequency Domain Check Factors Test – ratio of vertical to horizontal displacement Inclination Test Period exceedence Test Quality of Telemetery: Discontinuities in transmission Data Corruption

8. Central Computer Automated Real-Time Processing Time Domain Quality Control Time Series Frequency Domain STORAGE raw spectral parameters WEB UPDATE Real-Time/Historical Pub/Non-Public NWS/NDBC Transmission Station Specific Requests Error/Diagnostic Statistics Post Processing Inter-comparison of last 24 hours PRODUCTS

9. - 1 06 01 07/11/2003 20:19:30 hrs UTC code=551: (bdd_editor.f) Tp out of bounds: 33.33 Waimea Buoy, HA – Frequency Domain QC 106: First indicated bad by TP errors > 30s BAD – Energy in Low Frequency for all records Flagged as NON-PUB 7/11/03

10. Scripps Canyon NorthWest Buoy Scripps Canyon NorthWest Buoy Frequency Domain QC Check factor values 114 01 08/16/2003 00:39:30 hrs UTC code=500: (bdd_editor.f) Abnormally high check factors (relationship between vertical and horizontal cross-spectra) Direction & Period erratic. Retrieved buoy and performed calibration tests. Calibration Test – Bad displacement

11. Wave Data Torrey Pines Inner – 20m deep Torrey Pines Outer – 549m deep Buoys approximately 6 miles apart

12. Dana Point Buoy, CA First indicated bad by inclination errors (> 5°) 096 01 09/13/2003 18:59:30 hrs UTC code=702: (buoy_stats.f) Inclination off, arch: 58.52 file: 52.73 GOOD DISPLACEMENT PLOTBAD – Exagerrated Horizontal Amplitude

13. Modeling Waves Across the Basin Headland shadowing Islandshadowing Diffractioneffects Amplification over shoals Refractive effects Directional wave buoy to initiate model

14. Pacific Gas & Electric Company Diablo Canyon Nuclear Power Plant 2004

15. CDIP In-House Diagnostics Paged: –off site (GPS & ARGOS) – data is > 1 hr old, – computer system is down, –computer partitions are > 90% full. Programmers emailed : –Offsite –Data > 1 hr old, power outages, data transfer failedSystem messages

16. CDIP Diagnostics 2004- Data Collection Coverage Percentages --------------------------------- La Jolla – 99.89% Torrey Pines O – 95.29% San Pedro – 95.24 Santa Monica – 99.64% Pt Dume – 95.88% Goleta – 97.06% Harvest – 94.70% Pt. Reyes – 91.88% Grays Harbor – 99.31% Guam – 99.72%

17. http://cdip.ucsd.edu