added get-edl file

Author: mikala-nsidc

reference-guides/get-edl.qmd

@@ -0,0 +1,9 @@
+---
+title: "NASA Earthdata Login"
+---
+
+NASA Earthdata are freely accessible to all users, but a NASA Earthdata Login is required for access.  Users can register for an Earthdata Login at https://urs.earthdata.nasa.gov/.
+
+
+Some programmatic data access methods are simplified by setting up your Earthdata Login credentials in a netrc file for easy authentication.
+Instructions for creating a netrc file can be found [here](https://nsidc.org/data/user-resources/help-center/creating-netrc-file-earthdata-login)