add overview rubric

Author: Andy Barrett

notebooks/SMAP/smap_as_datatree.ipynb

@@ -1,11 +1,72 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "e55a759f-e465-41d7-9674-71b73e4f8412",
+   "metadata": {},
+   "source": [
+    "<center>\n",
+    "<img src='./img/nsidc_logo.png'/>\n",
+    "\n",
+    "# 2.0 Read and Plot SMAP data using `xarray.DataTree`\n",
+    "\n",
+    "</center>\n",
+    "---"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "3e5b1d2e-04df-40f1-a9f8-f4fb48e32656",
    "metadata": {},
    "source": [
-    "# Open SMAP L3 HDF5 files as `xarray.DataTree`"
+    "## 1. Overview  \n",
+    "In this tutorial, we will read the SMAP data we downloaded in 1.0 Download SMAP data notebook, read the data into an `xarray.DataTree`, create a map of soil moisture and plot a time-series soil moisture for a location on Earth."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "6060c844-782d-4510-b643-0b78273f069d",
+   "metadata": {},
+   "source": [
+    "### **Credits**\n",
+    "\n",
+    "This tutorial is based on the notebooks originally provided to NSIDC by Adam Purdy. Jennifer Roebuck of NSIDC updated the tutorials to include the latest version of SMAP data and use earthaccess for authentication, seatching for and downloading the data in order to incorporate it into the NSIDC-Data-Tutorials repo. \n",
+    "\n",
+    "For questions regarding the notebook, or to report problems, please create a new issue in the [NSIDC-Data-Tutorials repo](https://github.com/nsidc/NSIDC-Data-Tutorials/issues)."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "56a6afe4-c559-412e-86bc-3f9530dc3d36",
+   "metadata": {},
+   "source": [
+    "### **Learning Goals**\n",
+    "\n",
+    "1. Read in SMAP data and navigate the metadata\n",
+    "2. Create a map with SMAP data\n",
+    "3. Plot a time-series at a location on Earth. "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c275f5c7-fa1b-4423-9967-03f46344ade0",
+   "metadata": {},
+   "source": [
+    "### **Prerequisites**\n",
+    "\n",
+    "1. The nsidc-tutorials environment is set up and activated. This [README](https://github.com/nsidc/NSIDC-Data-Tutorials/blob/main/README.md) has setup instructions.\n",
+    "2. SMAP data that were downloaded in the previous notebook tutorial 1.0 Download SMAP data. \n",
+    "3. The EASE-Grid 2.0 longitude and latitude data sets. The binary format of these files have been provided within this repo for use in this tutorial, but please note they are also available in NetCDF format from the NSIDC website at this [page](https://nsidc.org/data/NSIDC-0772/versions/1). \n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "a0b23d36-8b5a-4bcf-b8a7-5dbc235853bf",
+   "metadata": {},
+   "source": [
+    "### **Time requirement**\n",
+    "\n",
+    "Allow 15 to 20 minutes to complete this tutorial."
    ]
   },
   {