Topic: Deprecation of Transport Layer Security (TLS) Version 1.0 by the Environmental Satellite Processing and Distribution System (ESPDS).

Date/Time Issued: March 18, 2019 1840Z

Product(s) or Data Impacted: There will be no impact for customers supporting the TLS 1.1 or TLS 1.2 protocol. Customers WITHOUT TLS 1.1 or TLS 1.2 support will lose connectivity to PDA.

Date/Time of Initial Impact: April 17, 2019 1400Z

Date/Time of Expected End: This is a Permanent Change

Length of Event: Permanent

Details/Specifics of Change: The PDA environment at NSOF is undergoing a planned change to its communication security. The PDA and NDE systems will no longer support client server communications using the TLS 1.0 cryptographic protocol. TLS 1.0 based connections will NOT WORK. This change applies to both FTPS and HTTPS connections. PDA and NDE users must be using TLS 1.1 or TLS 1.2 protocol versions. Please email PDA support at for further information.

Contact Information for Further Information: ESPC Operations at and 301-817-3880.

Web Site(s) for applicable information: N/A

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