You are required to be a registered user for ordering the data. Be a registered user by filling up on-line form. Login to MOSDAC site . Select either "Satellite data order" or "In-situ data order". Select the data of your interest. Add to cart. submit the request. You will be given a request id no. You will be intimated through the mail about readiness of your data. You can also check status of your request from left menu under "My request tab"