add full instruction for ecmwf api

examples/Download Satellite data.ipynb

@@ -48,7 +48,20 @@
     "1 - to be able to use Hapi to download ECMWF data you need to register and setup your account in the ECMWF website (https://apps.ecmwf.int/registration/)\n",
     "\n",
     "2 - Install ECMWF key (instruction are here https://confluence.ecmwf.int/display/WEBAPI/Access+ECMWF+Public+Datasets#AccessECMWFPublicDatasets-key)\n",
-    "(https://confluence.ecmwf.int/display/WEBAPI/Install+ECMWF+API+Key)"
+    "(https://confluence.ecmwf.int/display/WEBAPI/Install+ECMWF+API+Key)\n",
+    " (to get youe API key https://api.ecmwf.int/v1/key/)\n",
+    " (key)[\\examples\\img\\key.png\n",
+    "\n",
+    "Copy/paste the key into a text file and save it to your $HOME directory as .ecmwfapirc (If you use\n",
+    "Windows, you have to put the file in C:\\Users\\<USERNAME>\\.ecmwfapirc\n",
+    "\n",
+    "3- add environment variables\n",
+    "\n",
+    "in your command prompt type the following lines and press enter\n",
+    "\n",
+    "export ECMWF_API_URL=\"https://api.ecmwf.int/v1\"\n",
+    "export ECMWF_API_KEY=\"73978adaef38142a3669b68789b78098\"\n",
+    "export ECMWF_API_EMAIL=\"[email protected]\"\n"
    ]
   },
   {
@@ -488,4 +501,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}