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Data products can be downloaded from any resource that displays them.
Steps below begin from data product's page, click on either navigating or searching for details on locating the data product of interest.

Once in the download mode, the user is transferred to new browser tab/window(s) and is utilizing the ERDDAP (Environmental Research Division's Data Access Program) code.


Download Data

NOTE: In addition to the steps outlined below there is also a shortcut download button below the data graph which will download the data with only the preferred_timestamp displayed.

Step 1: Select Download in the main drop down menu

The action menu is located in the far upper right of the Data Product Facepage and the drop down leads to the Download option.

Step 2: Select the variables of interest for downloading

Leave checked the variables to be downloaded.

There are 4 timestamps that are listed for a parsed data stream:       

port_timestamp This is the timestamp generated by the ION system's port-agent for the instrument.  The port agent is the first component of the ION system to receive the data from the instrument and therefore the closest to the instrument in time.
driver_timestamp This is the timestamp generated by the ION system's instrument driver for the instrument.  The instrument driver receives instrument data from the instrument's port-agent.
internal_timestamp This is the timestamp generated by the instrument if it generates one.
ingestion_timestamp This is the timestamp generated by the ION system when the data is ingested into the data product.

There is a variable called preferred_timestamp which is a reference to one of the 4 timestamps listed above, and defaults to port_timestamp.  It is not an additional timestamp, it just indicates which of the 4 timestamps is the preferred timestamp.

There is a variable called time which is the value of the preferred timestamp, and therefore is a duplicate of one of the 4 timestamps (the one that preferred_timestamp references).  To limit the temporal scope of the data that is downloaded set the values for this variable.

Any other time variables are specified in the instrument's IOS, and are instrument specific.  Refer to the instrument's IOS for a description of these.

Step 3: Choose a file type for download

Choose a file type that you can open with one of the applications on your computer (.csv suggested).

Step 4: Download the data via the submit button

Once the appropriate time-frame, variables, and file type are selected, click on submit to download the data.

Note that the amount of data selected will affect the speed of the download, for large datasets, be patient. Specifics for saving the download are dependent on the browser in use, follow standard browser functionality.


Visualize Data, Create and Download an Image

Step 1: Select Download in the main drop down menu

The action menu is located in the far upper right of the Data Product Facepage and the drop down leads to the Download option.

Step 2: Select Make Graph link


Step 3: Select and adjust the graph type

Choose the type, x and y axis, and color.

Step 4: Adjust the time-frame of the data

Use the slider bar below, the start/stop times to adjust timeframe. The two bars are all the way to right, extend left half to include previous events.

Step 5: Select and adjust the graph settings

Select the desired settings.

Step 6: Choose a file type for download

Choose a file type that you can open with one of the applications on your computer (.png suggested).

Step 7: Redraw the graph

During the process of selecting settings, it may be necessary to redraw the graph numerous times to see the updated view of the graph. Be sure to redraw before downloading.

Step 8: Download the image

Activate the Download for an image with a click on the button.

Note that the amount of data selected will affect the speed of the download, for large datasets, be patient. Specifics for saving the download are dependent on the browser in use, follow standard browser functionality.


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