Changes between Version 22 and Version 23 of PointObservationConventions


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Timestamp:
03/09/11 10:00:47 (9 years ago)
Author:
painter1
Comment:

This page has been superseded by a Microsoft Word file, now being edited outside the Trac system.

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  • PointObservationConventions

    v22 v23  
     1 '''This page is obsolete.  For a more recent draft, see'''
     2 [https://cf-pcmdi.llnl.gov/trac/attachment/ticket/37/CFch9-may4.docx     this Microsoft Word file]
    13= Chapter 9 Discrete Sampling Geometries =
    2 
    34Chapter 5 explains how to specify Coordinate Systems using coordinate variables and auxiliary coordinate variables. This section extends and modifies that framework for data with discrete sampling geometries, previously called "point observation data".
     5{{{
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    49
    510== 9.1 Overview ==
     
    4550
    4651== 9.2 Point Data ==
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    4756
    4857To represent data at scattered, unconnected locations, both data and coordinates use the same, single dimension. The 'coordinates' attribute is used on the data variables to unambiguously identify the time, lat, lon, and vertical auxiliary coordinate variables.
     
    8796
    8897== 9.3 Time Series Data ==
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    89102
    90103Discrete data may be taken at a set of named locations called stations. The set of observations at a particular station, if ordered by time, is a time series, and the file contains a collection of timeSeries features.
     
    362375
    363376== 9.4 Trajectory Data ==
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    364381
    365382Point data may be taken along a flight path or ship path, constituting a connected set of points called a trajectory.
     
    573590 
    574591== 9.5 Profile Data ==
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    575596
    576597A series of connected observations along a vertical line, like an atmospheric or ocean sounding, is called a profile. The lat, lon locations are factored out into the profile.
     
    792813
    793814== 9.6 Time Series of Profiles ==
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    794819
    795820When profiles are taken at a set of stations, one gets a time series of profiles at each station, called a timeSeriesProfile.
     
    9851010
    9861011== 9.7 Trajectory of Profiles ==
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    9871016
    9881017When profiles are taken along a trajectory, one gets a time series of profiles called a trajectoryProfile. This looks like a collection of profiles (see 9.5), except that the profile locations are assumed to be a connected set of points along a trajectory. A single file may contain one or more such trajectoryProfile features.
     
    11601189
    11611190== 9.8 Other changes ==
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    11621195
    11631196=== 9.8.1 New standard names ===
     
    12081241
    12091242   [http://www.unidata.ucar.edu/software/netcdf-java/reference/FeatureDatasets/CFencodingTable.html Summary of encodings]
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