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Managing the collection and dissemination of non-homogenous data from numerous, diverse, geographically scattered sources. Jim Block Chief Meteorologist Meteorlogix. Basic Principals. More data is a good thing. Forecasters need specific observations for good warnings and forecasts

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Jim Block Chief Meteorologist Meteorlogix

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Jim block chief meteorologist meteorlogix

Managing the collection and dissemination of non-homogenous data from numerous, diverse, geographically scattered sources

Jim Block

Chief Meteorologist

Meteorlogix


Basic principals

Basic Principals

  • More data is a good thing.

    • Forecasters need specific observations for good warnings and forecasts

    • No meteorologist ever has too much data

    • Local! Local! Local!

    • Atmospheric information has a Forensic value, as well as Meteorological and Climatological value


Basic principals1

Basic Principals

  • The commercial value of observations decreases over time.

    • The closer to “real-time” observations are, the more potential uses it has

  • The commercial value never goes to zero.

    • Weather data does have a Forensic and Risk Management value even years later


Basic principals2

Basic Principals

  • The value of atmospheric information is maximized when it is available to commercial entities.

    • There is no need for special systems or programs to distribute this additional atmospheric information

    • Standardization increases the value

    • Non-Proprietary


Basic principals3

Basic Principals

  • Privately funded atmospheric information systems need to protect their investment.

    • Intrinsic value of the data to the owner

    • Competitive issues need to be respected


Data management

Data Management

  • Non-homogeneity of data

  • Metadata

  • Timeliness

  • Format

  • Reliability


Data management1

Data Management

  • Non-homogeneity of data from diverse sources

    • Siteing

      • Often chosen for convenience, not representativeness

      • May present systematic errors

      • Needs to be understood and captured

    • Quality of Instruments

    • Calibration

      • How often?

      • Who does it?


Data management2

Data Management

  • Metadata is crucial for the effective use of non-homogenous data

    • Who collects and manages the Metadata?

    • Who double checks the accuracy?

    • How is the Metadata maintained?

    • Who will be responsible?


Data management3

Data Management

  • Timeliness

    • Frequency. At what observational frequency is value maximized?

      • Many instruments are capable of reporting nearly continuously

    • Availability. How frequently should observations be available?

      • ASOS has the ability to report observations every minute

      • There is a trade-off between frequency and communications bandwidth (cost)

    • Latency. How soon should observations be available?

      • Whatever the frequency, reports need to be available within 10-20% of the time between observations (e.g. Hourly METAR observations are taken within 6-12 minutes of the top of each hour, and available via the FOS within 6-12 minutes of observation)


Data management4

Data Management

  • Format

    • Standardization of formats is desirable

    • Inclusion of all available parameters

      • Parameters crucial to one user may be unimportant to others

    • Has to be able to deal with observations at different intervals, and different ages


Data management5

Data Management

  • Reliability

    • Sporadic or inconsistent reports decrease value dramatically

    • Quality Control. Has the data been checked for:

      • Reasonableness?

      • Temporal consistency?

      • Spatial consistency?

    • Will users know that QC is (or is not) being done?


Conclusion

Conclusion

  • Clear definition of the roles and responsibilities in the management of non-homogenous data is crucial.

  • A few standards and formats are better than many.

  • The closer to real-time data is available, the higher the value of that data.

  • The higher the value of data, the more ALL aspects of the meteorological community, government, research, and commercial, benefit.


Contact information

Contact Information

Jim Block

Meteorlogix

(952) 890-0609

[email protected]


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