jliuocean / 2023-SMODE-Open-Data-Workshop

2023-SMODE-Open-Data-Workshop

November 9, 2023

Recordings and Presentations

Agenda

TBD

Prerequisites

To follow along hands-on during the Workshop, please do the following:

Earthdata Login account

Create an Earthdata Login account (if you don’t already have one) at https://urs.earthdata.nasa.gov Remember your username and password; you will need to download or access cloud data during the workshop and beyond.

S-MODE datasets can be found through Earthdata Search: https://search.earthdata.nasa.gov/portal/podaac-cloud/search?fpj=S-MODE

Set up .netrc file for Earthdata login

You will need a netrc file containing your NASA Earthdata Login credentials in order to execute the notebooks. A netrc file can be created manually within text editor and saved to your home directory. An example of the required content is below.

machine urs.earthdata.nasa.gov
  login <USERNAME>
  password <PASSWORD>

and would be replaced by your actual Earthdata Login username and password respectively.

NOTE the .netrc file stores your password in plaintext - choose a unique password that is not used for other sensitive logins.

You can also run the following script to automatically create your .netrc file if it does not yet exist:

from netrc import netrc
from subprocess import Popen
from platform import system
from getpass import getpass
import os

urs = 'urs.earthdata.nasa.gov'    # Earthdata URL endpoint for authentication
prompts = ['Enter NASA Earthdata Login Username: ',
          'Enter NASA Earthdata Login Password: ']

# Determine the OS (Windows machines usually use an '_netrc' file)
netrc_name = "_netrc" if system()=="Windows" else ".netrc"

# Determine if netrc file exists, and if so, if it includes NASA Earthdata Login Credentials
try:
    netrcDir = os.path.expanduser(f"~/{netrc_name}")
    netrc(netrcDir).authenticators(urs)[0]

# Below, create a netrc file and prompt user for NASA Earthdata Login Username and Password
except FileNotFoundError:
    homeDir = os.path.expanduser("~")
    Popen('touch {0}{2} | echo machine {1} >> {0}{2}'.format(homeDir + os.sep, urs, netrc_name), shell=True)
    Popen('echo login {} >> {}{}'.format(getpass(prompt=prompts[0]), homeDir + os.sep, netrc_name), shell=True)
    Popen('echo \'password {} \'>> {}{}'.format(getpass(prompt=prompts[1]), homeDir + os.sep, netrc_name), shell=True)
    # Set restrictive permissions
    Popen('chmod 0600 {0}{1}'.format(homeDir + os.sep, netrc_name), shell=True)

    # Determine OS and edit netrc file if it exists but is not set up for NASA Earthdata Login
except TypeError:
    homeDir = os.path.expanduser("~")
    Popen('echo machine {1} >> {0}{2}'.format(homeDir + os.sep, urs, netrc_name), shell=True)
    Popen('echo login {} >> {}{}'.format(getpass(prompt=prompts[0]), homeDir + os.sep, netrc_name), shell=True)
    Popen('echo \'password {} \'>> {}{}'.format(getpass(prompt=prompts[1]), homeDir + os.sep, netrc_name), shell=True)

Tutorials and Data Access

S-MODE data can be found through Earthdata Search here: https://search.earthdata.nasa.gov/portal/podaac-cloud/search?fpj=S-MODE

Science Case Study

TBD