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https://issues.apache.org/jira/browse/SDAP-344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph C. Jacob updated SDAP-344:
---------------------------------
    Description: 
Some datasets lack a time variable and instead encode the time stamp in global 
attributes called time_coverage_start and time_coverage_end.  Example:
 :time_coverage_start = "2002-07-04T00:40:05.000Z";
 :time_coverage_end = "2017-08-01T03:00:00.000Z";
 The ingester needs to be able to extract a single time stamp from these 
attributes, using either of the attributes, or the average of both.

The ingester should read the time stamp from a granule using these 3 methods 
(in priority order):
 # From the time variable
 # From the global attributes (this ticket)
 # From the filename

All three were options in the old legacy ningester.  An example of a dataset 
for which this is required is MODIS Aqua 8-day 4km Chlorophyl 
([https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/Mapped/8-Day/4km/chlor_a/).|https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/Mapped/8-Day/4km/chlor_a/)]

  was:
Some datasets lack a time variable and instead encode the time stamp in global 
attributes called time_coverage_start and time_coverage_end.  Example:
 :time_coverage_start = "2002-07-04T00:40:05.000Z";
 :time_coverage_end = "2017-08-01T03:00:00.000Z";
 The ingester needs to be able to extract a single time stamp from these 
attributes, using either of the attributes, or the average of both.

The ingester should read the time stamp from a granule using these 3 methods 
(in priority order):
 # From the time variable
 # From the global attributes (this ticket)
 # From the filename

All three were options in the old legacy ningester.


> Add ability to read time stamp from global attributes
> -----------------------------------------------------
>
>                 Key: SDAP-344
>                 URL: https://issues.apache.org/jira/browse/SDAP-344
>             Project: Apache Science Data Analytics Platform
>          Issue Type: Improvement
>          Components: granule-ingester
>            Reporter: Joseph C. Jacob
>            Priority: Major
>
> Some datasets lack a time variable and instead encode the time stamp in 
> global attributes called time_coverage_start and time_coverage_end.  Example:
>  :time_coverage_start = "2002-07-04T00:40:05.000Z";
>  :time_coverage_end = "2017-08-01T03:00:00.000Z";
>  The ingester needs to be able to extract a single time stamp from these 
> attributes, using either of the attributes, or the average of both.
> The ingester should read the time stamp from a granule using these 3 methods 
> (in priority order):
>  # From the time variable
>  # From the global attributes (this ticket)
>  # From the filename
> All three were options in the old legacy ningester.  An example of a dataset 
> for which this is required is MODIS Aqua 8-day 4km Chlorophyl 
> ([https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/Mapped/8-Day/4km/chlor_a/).|https://oceandata.sci.gsfc.nasa.gov/directaccess/MODIS-Aqua/Mapped/8-Day/4km/chlor_a/)]



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