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3.47. Local Granule ID Search

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What is a Local Granule ID?

A local granule ID applies only to data obtained from EOS platforms. It is a series of characters which provide important information about the granule to the EOS scientist. Local granule IDs are created at the DAAC where the data granule (and parent data set) originate. Because local granule IDs are used for EOS data sets only, local granule ID searches are sent only to EOS data servers (e.g. GSFC-ECS, NSIDC-ECS, EDC-ECS, and LARC-ECS). Note that an EOS data granule has both a data granule ID (See help page for Data Granule ID Search) and a local granule ID associated with it. The local granule ID contains more information about the data granule than does the data granule ID.

Local granule IDs have a specific format that is dependent upon from which EOS instrument the data is taken, and the data's science discipline.

MODIS(Atmospheres)

MODIS (Land Processes)

MODIS (Oceans)

MISR

  1. ProductName is made up of any set of characters (including possibly "_"). For example, "AGP", "GRP_TERRAIN", "AS_OCEAN_QA". Use of "QA" for QA files and "BR" for browse products is an informal convention, but not actually required by the MISR naming convention. This field is required.

  2. The MinMax indicates if the parameters in the file are minimum or maximum values. This is currently only used for QA thresholds (which are *not* products, so you aren't likely to see this field). The value is either "MIN" or "MAX". This field is optional.

  3. Mode is one of "GM", for global mode; "LM", for local mode; "CL" for calibration mode. This field is optional.

  4. Season is one of "SPR", for spring; "SUM" for summer; "FALL", for fall; "WIN" for winter, or the first 3 letters of a month name (e.g., "JAN"). This field is optional.

  5. Path is a number from 1 to 233. It is a string like "Pnnn", where the number is exactly 3 digits using leading zeroes if needed, e.g., "P157", "P002". This field is optional, but is required if the Orbit field is filled in.

  6. Orbit is the absolute orbit sequence number from start of the mission. This is a string like "Onnnnnn", where the number is exactly 6 digits using leading zeroes if needed, e.g., "O376534", "O000010". This field is optional.

  7. Camera is the camera type, in all caps, e.g., "DF", "BA". This field is optional. Some data sets only depend on the camera angle, not its sign (e.g., the same file is used for "DF" and "DA" cameras). For these types of data sets, the camera name is "DCAM", "CCAM", "BCAM", "ACAM" or "NCAM".

  8. Site gives the local mode site number. It is a string like "SITEn", e.g., "SITE1", "SITE4". This field is required if the mode is "LM", and illegal otherwise. An alternative to a site number is to follow site with a name, which contains no "_", e.g., "SITE_ROGERSLAKE". Local mode sites were originally given numbers, giving file names like "SITE1", but it is planned to use descriptive names like "SITE_ROGERSLAKE" in the future.

  9. Time Series gives the time order of a series of files, e.g., the threshold updates for generating the RCCM. It is a string like "Tnnn", where the number is exactly 3 digits, using leading zeros if needed, e.g., "T001". This field is optional.

  10. Version contains both a format and data content version, e.g., "F01_01". The format Fxx part was a later addition, some files only contain the data content version number.

  11. ext is the file extension chosen for the file, e.g., ".hdf".

Choose Data Set and Local Granule ID

The Local Granule ID Search is similar to the Primary Data Search Form, in that it provides results that contain descriptions of a specified granule from one data set.

For a local granule ID search:

Choose Additional Options

Max Search Time:

Some searches take a long time to run. Your search will automatically stop when the maximum search time is reached, any partial results will be displayed. You can change the maximum search time to any whole number of minutes up to the default maximum.

Query Name:

The name the system will try to give to the query when you save the query (download) to your local machine. Note, that some versions of Microsoft Internet Explorer ignore this and create their own bizarre file names.

Start Search

Once you've specified a data set and local granule id, click on the Start Search! button to start your search.

Upload/Download a Query

At the bottom of the page, you'll see this section. If you've named your query, you can download a copy of it to your local machine and save it by clicking on the Download query button. If you've already got a saved query, you can click on the browse button to show the browser where your query is and then upload it with the Upload Query button. The search type will be set to your current selection and not the search type from the uploaded file.

Search Types

Using these links located on the lower left side of the page, you can switch to the Primary Data Search Form, Detailed Document Search Form, the Summary Document Search Form or the Data Granule ID Search by clicking on the proper link.

You can also switch to the Primary Data Search Form by clicking the link at the top of the page.

Local Granule ID search supports the following criteria for refining your search:

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