If you are new to CLASS, you may view the site as a "Guest User." If you choose to search the CLASS inventory before registering, you may do so; however, you will be prompted to register before placing an order. Click on the "Register" link at the top of the page to go to the "User Profile" page to become a registered user.

Once you have filled out the User Profile Page, you will be sent an email with your user name (you choose a password when registering). At this point, you may log on, search our web site, and place orders at your convenience.

Please note that some of the data delivered by CLASS requires special processing software. You can write your own or you can order commercial products. For a small sample of commercially available software packages, please see the FAQ Section titled "Satellite Data Viewing Software."

CLASS delivers data electronically via FTP. Once you place an order, you will receive an Order Verification email stating your order number and indicating that your order is being processed. Once processing of each item within your order has completed, you will receive a Delivery Notification email providing instructions on how to pull your data. On the User Preferences Page, you may specify whether or not you wish to receive these Order Verification emails and whether you want to receive one Delivery Notification email per item or only one notice per order.

If you have previously completed your User Profile, please click on the "Log In" button on the top, left-hand side of the Home Page. You will then be prompted to enter your CLASS user name and password. After entering this information, you will be redirected to our Site Entry Page from where you can search the site and place orders for data.

The CLASS web site allows you to search the inventory based on each available type of product. The product menu allows you to select the desired product and press go, at which point you are taken to the Search Criteria Page that presents information and search criteria relevant to that product.