Data Subscription Requests
Subscriptions are available for Aquarius, MODIS, and NISE data. Subscriptions apply only to future data as they are delivered to NSIDC; they cannot be used to receive data already in NSIDC's archive. This option is convenient if you require new data for a specific region as they are ingested into NSIDC's data archive, but you do not want to actively search and order data files each time. Based on your preference, NSIDC can either push new data to your local server via File Transfer Protocol (FTP) or Secure Copy (SCP), or can stage data on our FTP site for you to pull. Subscriptions can also be bundled on a weekly basis or whatever you prefer if you do not want to receive e-mail notifications each time a data file is ingested into NSIDC's archive. Please indicate this preference in the subscription form linked at the end of this page.
This page explains the basic information NSIDC needs to process your subscription request. We encourage you to read these sections carefully before entering your information in the subscription request form, linked at the end of this page.
Please provide your name, address, organization, e-mail address, affiliation type, and category.
Method of Data Delivery
- FTP Push: Data files are sent to your local server via FTP as soon as they are available.
- FTP Pull: Data files are staged on NSIDC's FTP site for you to pull at your convenience. You have thirty days to retreive your data before files are automatically deleted.
- Secure Copy (SCP): Data files are securely transferred to your local server using this secure shell protocol as soon as the data files are available.
Custom Message: After you establish a subscription with us, our system sends you an e-mail message whenever data are pushed to you or staged on our FTP server. Most of the e-mail content is information generated by the sysem, and unfortunately cannot be changed. The subject line says ECS Notification; however, you can provide us with a unique message that you want to appear in the body of the e-mail message. Refer to the USERSTRING in the example below to help you better identify the purpose of the subscription. Please provide your unique message in the Custom Message area of the subscription form.
Sample e-mail notification from an FTP Push order:
Subject: ECS Notification
Date: Tue, 7 Sep 2004 11:31:00 -0600 (MDT)
From: CM SHARED (CM Code Delivery) <email@example.com>
Thank you for using the Earth Observing System Distribution System. For more information on your request contact User Services at the NSIDC DAAC.
Please include the data below in any correspondence with the DAAC.
The data distributed for this request can be found on the FTPHOST below in the directory specified by FTPDIR below.
Support Contacts: NSIDC User Services
University of Colorado
Boulder, CO 80309-0449
ORDERID: NONE(Custom Message)
USERSTRING: NISE subscription for testing
FINISHED: 09/07/2004 11:30:40
MEDIA 1 of 1
Please provide the following information if you select the FTP Push delivery option.
Local Host Name: Indicate the domain name or numerical IP address where the data should be sent. Example: servername.colorado.edu
Local Directory: Provide the full directory path where the data will be pushed. This directory should have write permission for a successful FTP transfer, and should already exist before you request a subscription. Also please ensure you have adequate disk space for your anticipated subscription. Refer to Data Volumes.
Local User Name: Account name to access your host. Please call NSIDC User Services (+1 303-492-6199) to provide your user name and password. You can also send us this information by e-mail, but be aware that this method is less secure.
Reverb account name: If you previously ordered data via Reverb and you have an account there, please indicate your account login name. (No passwords are required.) If you do not have a Reverb account, you must create one. Go to the Reverb "Create an Account" page.
Data Set Title or ID: Please indicate the Data Set Title or Short Name ID. If you are unsure of these, please consult the following data summaries:
- AMSR-E data
- MODIS data
- Near-Real-Time SSM/I EASE-Grid Daily Global Ice Concentration and Snow Extent (NISE)
Data Set Versions: Please indicate the version number you prefer to receive. Algorithms are continually improved, as limitations become apparent in early versions of data. As a new algorithm becomes available, a new version of data is released. Users are encouraged to work with the latest version available, which is the highest version number. NISE data are Version 1. Refer to the following pages for AMSR-E and MODIS version numbers.
Also specify whether you want to change to a new version as it becomes available, or continue to receive an earlier version until it is no longer available.
Geographic Coordinates: Enter the approximate geographic coordinates of your study area. Data will not be subsetted upon delivery. This information is only used to identify data files that correspond to your study area, and to trigger a subscription for those files. You will receive the full data files.
Other Special Restrictions: Please indicate other criteria for your subscription. Each AMSR-E, MODIS, and NISE file contains metadata that indicates the level of quality, percentage of cloud cover, percentage of missing data, and many other variables, specific to that file. For example, if you indicate you want files with less than 75 percent cloud cover, only files that meet this criteria will be included in the subscription. Experienced users may recognize some of the most commonly used quality indicators:
ScienceQualityFlag (Passed, Failed, Being Investigated, Not Investigated, Inferred Passed, Inferred Failed, Suspect, or Hold.)
These are helpful, for example, if you only want data files with the ScienceQualityFlag set to Passed. Please indicate this in the subscription request form. You can also indicate your preferred temporal coverage, but subscriptions are primarily used to send you new data as they become available.
Start and Expiration Dates of Subscription: Please indicate how long you want the subscription to last, not the temporal coverage of the data.