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Disdrometer and Tipping Bucket Rain Gauge Handbook - ARM

Disdrometer and Tipping Bucket Rain Gauge Handbook - ARM

MJ Bartholomew, December

MJ Bartholomew, December 2009, DOE/SC-ARM/TR-079 Contents 1.0 General Overview ................................................................................................................................. 1 2.0 Contacts ................................................................................................................................................ 1 2.1 Mentor .......................................................................................................................................... 1 2.2 Instrument Developer ................................................................................................................... 1 3.0 Deployment Locations and History ...................................................................................................... 1 4.0 Near-Real-Time Data Plots .................................................................................................................. 2 5.0 Data Description and Examples ........................................................................................................... 2 5.1 Data File Contents ........................................................................................................................ 2 5.1.1 Primary Variables and Expected Uncertainty ................................................................... 2 5.1.2 Secondary/Underlying Variables ...................................................................................... 5 5.1.3 Diagnostic Variables ......................................................................................................... 5 5.1.4 Data Quality Flags ............................................................................................................. 5 5.1.5 Dimension Variables ......................................................................................................... 6 5.2 Annotated Examples .................................................................................................................... 7 5.3 User Notes and Known Problems ................................................................................................ 7 5.4 Frequently Asked Questions ........................................................................................................ 8 6.0 Data Quality .......................................................................................................................................... 8 6.1 Data Quality Health and Status .................................................................................................... 8 6.2 Data Reviews by Instrument Mentor............................................................................................ 8 6.3 Data Assessments by Site Scientist/Data Quality Office ............................................................. 8 6.4 Value-Added Products and Quality Measurement Experiments .................................................. 8 7.0 Instrument Details................................................................................................................................. 9 7.1 Detailed Description ..................................................................................................................... 9 7.1.1 List of Components ........................................................................................................... 9 7.1.2 System Configuration and Measurement Methods ......................................................... 10 7.1.3 Specifications .................................................................................................................. 12 7.2 Theory of Operation ................................................................................................................... 12 7.3 Calibration .................................................................................................................................. 12 7.3.1 Theory ............................................................................................................................. 13 7.3.2 Procedures ....................................................................................................................... 13 7.3.3 History ............................................................................................................................. 13 7.3.4 User Manuals................................................................................................................... 13 7.3.5 Routine Operation and Maintenance ............................................................................... 13 7.3.6 Software Documentation ................................................................................................. 15 7.3.7 Additional Documentation .............................................................................................. 15 7.4 Glossary ...................................................................................................................................... 15 7.5 Acronyms ................................................................................................................................... 16 7.6 Citable References...................................................................................................................... 16 7.7 Formulas Used in Data Processing ............................................................................................. 16 iii

MJ Bartholomew, December 2009, DOE/SC-ARM/TR-079 Figures 1 Example of wind noise and processor testing. ...................................................................................... 7 2 Tipping bucket and disdrometer wiring diagram. ............................................................................... 10 3 Disdrometer and tipping bucket system enclosure 1. ......................................................................... 11 4 Disdrometer and tipping bucket system enclosure 2. ......................................................................... 11 Tables 1 Disdrometer variables, datastream ***************......................................................................... 2 2 Tipping bucket rain gauge variables, datastream ******************............................................. 3 3 Drop class specifics. ............................................................................................................................. 4 4 Disdrometer data quality variables. ...................................................................................................... 5 5 Tipping bucket data quality flags. ......................................................................................................... 6 6 Disdrometer dimension variables. ........................................................................................................ 6 7 Tipping bucket dimension variables. .................................................................................................... 7 iv

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