Excel Spreadsheet Automation on NASA Data with the QUERY Formula

The CData Excel Add-In for NASA provides formulas that can query NASA data. The following three steps show how you can automate the following task: Search NASA data for a user-specified value and then organize the results into an Excel spreadsheet.

The syntax of the CDATAQUERY formula is the following:

=CDATAQUERY(Query, [Connection], [Parameters], [ResultLocation]);

This formula requires three inputs:

• Query: The declaration of the NASA data records you want to retrieve, written in standard SQL.

• Connection: Either the connection name, such as APIConnection1, or a connection string. The connection string consists of the required properties for connecting to NASA data, separated by semicolons.

  Using API Key Authentication

  Most NASA API endpoints (APOD, NeoWS, DONKI, TechTransfer) require a NASA API key. Register for a free key at https://api.nasa.gov. The default DEMO_KEY provides limited access (30 requests/hour, 50 requests/day); a registered key allows 1,000 requests/hour.

  The following endpoints do not require an API key and work without authentication: EONET (Earth Observatory Natural Event Tracker), EPIC (Earth Polychromatic Imaging Camera), NASA Image and Video Library, and TechPort.

  After obtaining your API key, set the following connection properties:

  • AuthScheme: Set this to APIKey.
  • APIKey: Set this to your NASA API key. Use DEMO_KEY for limited testing.

  Example Connection String

  Profile=C:\profiles\NASA.apip;AuthScheme=APIKey;APIKey=YOUR_NASA_API_KEY
  

  Connecting to NASA

  Once the authentication is configured, you can connect to NASA and query data from any of the available tables such as AstronomyPictureOfDay, NearEarthObjectFeed, EonetEvents, and NasaImageLibrary.

• ResultLocation: The cell that the output of results should start from.

Pass Spreadsheet Cells as Inputs to the Query

The procedure below results in a spreadsheet that organizes all the formula inputs in the first column.

1. Define cells for the formula inputs. In addition to the connection inputs, add another input to define a criterion for a filter to be used to search NASA data, such as StartDate.
2. In another cell, write the formula, referencing the cell values from the user input cells defined above. Single quotes are used to enclose values such as addresses that may contain spaces.

=CDATAQUERY("SELECT * FROM AstronomyPictureOfDay WHERE StartDate = '"&B4&"'","Profile="&B1&";AuthScheme="&B2&";APIKey="&B3&";Provider=API",B5)


3. Change the filter to change the data.