added cryo2ice notebook and image files

Author: mikala-nsidc

notebooks/ICESat-2_Cloud_Access/ATL06-direct-access.ipynb

@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "c91169d7",
+   "id": "97c67e4f-43c4-4a69-9e9b-c45c7c882830",
    "metadata": {
     "tags": []
    },
@@ -52,10 +52,8 @@
     "\n",
     "### **Example of end product** \n",
     "At the end of this tutorial, the following figure will be generated:\n",
-    "<center>\n",
-    "<img src='./img/atl06_example_end_product.png'/>\n",
-    "</center>\n",
-    "\n",
+    "       \n",
+    "![ATL06 land ice heights](./img/atl06_example_end_product.png)\n",
     "### **Time requirement**\n",
     "\n",
     "Allow approximately 20 minutes to complete this tutorial."
@@ -397,7 +395,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.15"
+   "version": "3.10.14"
   }
  },
  "nbformat": 4,

notebooks/ICESat-2_Cloud_Access/ICESat2-CryoSat2.ipynb

@@ -0,0 +1,63 @@
+import os
+import platform
+from ftplib import FTP
+import sys
+
+
+download_file_obj = None
+read_byte_count = None
+total_byte_count = None
+
+
+def get_padded_count(count, max_count):
+    return str(count).zfill(len(str(max_count)))
+
+
+def file_byte_handler(data):
+    global download_file_obj, read_byte_count, total_byte_count
+    download_file_obj.write(data)
+    read_byte_count = read_byte_count + len(data)
+    progress_bar(read_byte_count, total_byte_count)
+
+
+def progress_bar(progress, total, prefix="", size=60, file=sys.stdout):
+    if total != 0:
+        x = int(size * progress / total)
+        x_percent = int(100 * progress / total)
+        file.write(f" {prefix} [{'='*x}{' '*(size-x)}] {x_percent} % \r")
+        file.flush()
+
+
+def download_files(user_email, esa_files):
+    global download_file_obj, read_byte_count, total_byte_count
+    print("About to connect to ESA science server")
+    with FTP("science-pds.cryosat.esa.int") as ftp:
+        try:
+            ftp.login("anonymous", user_email)
+            print("Downloading {} files".format(len(esa_files)))
+
+            for i, filename in enumerate(esa_files):
+                padded_count = get_padded_count(i + 1, len(esa_files))
+                print("{}/{}. Downloading file {}".format(padded_count, len(esa_files), os.path.basename(filename)))
+
+                with open(os.path.basename(filename), 'wb') as download_file:
+                    download_file_obj = download_file
+                    total_byte_count = ftp.size(filename)
+                    read_byte_count = 0
+                    ftp.retrbinary('RETR ' + filename, file_byte_handler, 1024)
+                print("\n")
+        finally:
+            print("Exiting FTP.")
+            ftp.quit()
+
+
+if __name__ == '__main__':
+
+    esa_files = ['SIR_SAR_L2/2019/12/CS_LTA__SIR_SAR_2__20191227T110305_20191227T111751_E001.nc', 'SIR_SAR_L2/2020/03/CS_LTA__SIR_SAR_2__20200329T163208_20200329T164044_E001.nc', 'SIR_SAR_L2/2020/01/CS_LTA__SIR_SAR_2__20200114T203033_20200114T204440_E001.nc', 'SIR_SAR_L2/2019/11/CS_LTA__SIR_SAR_2__20191103T134759_20191103T135125_E001.nc', 'SIR_SAR_L2/2020/02/CS_LTA__SIR_SAR_2__20200204T191657_20200204T192558_E001.nc', 'SIR_SAR_L2/2019/12/CS_LTA__SIR_SAR_2__20191216T215645_20191216T220909_E001.nc', 'SIR_SAR_L2/2020/03/CS_LTA__SIR_SAR_2__20200315T065755_20200315T071241_E001.nc', 'SIR_SAR_L2/2019/10/CS_LTA__SIR_SAR_2__20191030T135252_20191030T135600_E001.nc', 'SIR_SAR_L2/2020/02/CS_LTA__SIR_SAR_2__20200219T081800_20200219T083303_E001.nc', 'SIR_SAR_L2/2020/01/CS_LTA__SIR_SAR_2__20200110T203717_20200110T204612_E001.nc', 'SIR_SAR_L2/2020/04/CS_LTA__SIR_SAR_2__20200409T053748_20200409T054151_E001.nc', 'SIR_SAR_L2/2020/04/CS_LTA__SIR_SAR_2__20200413T053254_20200413T053659_E001.nc', 'SIR_SAR_L2/2020/02/CS_LTA__SIR_SAR_2__20200208T191154_20200208T192117_E001.nc', 'SIR_SAR_L2/2020/03/CS_LTA__SIR_SAR_2__20200319T065300_20200319T070802_E001.nc', 'SIR_SAR_L2/2020/03/CS_LTA__SIR_SAR_2__20200304T175209_20200304T180102_E001.nc', 'SIR_SAR_L2/2019/11/CS_LTA__SIR_SAR_2__20191128T122800_20191128T123212_E001.nc', 'SIR_SAR_L2/2019/10/CS_LTA__SIR_SAR_2__20191009T150801_20191009T151142_E001.nc', 'SIR_SAR_L2/2019/11/CS_LTA__SIR_SAR_2__20191121T231659_20191121T232817_E001.nc', 'SIR_SAR_L2/2020/02/CS_LTA__SIR_SAR_2__20200215T082253_20200215T083741_E001.nc', 'SIR_SAR_L2/2020/01/CS_LTA__SIR_SAR_2__20200121T094259_20200121T095800_E001.nc', 'SIR_SAR_L2/2019/10/CS_LTA__SIR_SAR_2__20191005T151255_20191005T151621_E001.nc', 'SIR_SAR_L2/2020/04/CS_LTA__SIR_SAR_2__20200427T150701_20200427T151544_E001.nc', 'SIR_SAR_L2/2019/10/CS_LTA__SIR_SAR_2__20191024T004201_20191024T005059_E001.nc', 'SIR_SAR_L2/2020/03/CS_LTA__SIR_SAR_2__20200308T174708_20200308T175621_E001.nc', 'SIR_SAR_L2/2020/04/CS_LTA__SIR_SAR_2__20200402T162707_20200402T163602_E001.nc']
+
+    if int(platform.python_version_tuple()[0]) < 3:
+        exit("Your Python version is {}. Please use version 3.0 or higher.".format(platform.python_version()))
+
+    email = input("Please enter your e-mail: ")
+
+    download_files(email, esa_files)