Manual on sea level measurement and ... - unesdoc - Unesco

Sea Level Measurement and Interpretation4. Datums and Datum Connections at Tide Gauges4.1 Some Definitions (extended from Volume 1)4.2 Levelling between Local Bench Marks4.3 Levelling Between Wider Area Marks4.4 Geodetic Fixing of Tide Gauge Benchmarks4.4.1 Introduction4.4.2 Geocentric Coordinates of Tide Gauge Benchmarks4.4.3 GPS Measurements4.4.4 DORIS Measurements4.4.5 Absolute Gravity Measurements4.5 Geodetic Contact Points5. Data Documentation and Processing5.1 Documentation and Archiving5.2 PC-Based Software5.2.1 Comments on Tidal Predictions5.2.2 Tidal Filters for ‘Mean Sea Level’5.2.3 Comments on Computations of Extremes6. Data Exchange Procedures6.1 Background6.2 Consequent Data Exchange Actions6.3 Fast Delivery Data6.4 Regional Programmes7. Training Materials, Training Courses and More Information7.1 Training Materials7.2 Sea Level Training Courses7.3 Further Information8. ReferencesAcknowledgementAnnex 1. GLOSS Requirements for Gauges54IOC <strong>Manual</strong>s and Guides No 14 vol IV