Topic: Beginning Operational Production of ACSPO AVHRR L3U SST


Date/Time Issued: July 24, 2019 1633 UTC


Product(s) or Data Impacted: M-BACSPO AVHRR SST GHRSST L3U


Date/Time of Initial Impact: M-BM-BJuly 24, 2019 1600 UTC


Date/Time of Expected End: N/A


Length of Outage: M-BM-BN/A


Details/Specifics of Change:


NESDIS will commence operational production and distribution of a GHRSST L3U SST product from AVHHR using the Advanced Clear-Sky Processor for Oceans (ACSPO) application. M-B

The L3U data are in 10-minute granules and are produced at a 0.02 degree grid spacing (roughly 2km).M-B Only Metop-A and Metop-B 1km (FRAC) data will be processed at this time.

The L3U files are ~x10 smaller in data volume than the L2P data and may be especially useful for modelers for whom the 1km data may not be needed and/or overwhelming.M-B L3U data volume is only roughly 0.7GB/day per satellite, compared to ~7.5GB/day for L2P.M-B

The data are available on the NESDIS Product Distribution and Access (PDA) system.M-B To subscribe to the ACSPO AVHRR GHRSST L3U product, please, if you are already an account holder on the PDA, sign up for a subscription using the PDA portal.

The PDA catalog short name is:

The file names will look like these sample file names:




MA = Metop-A
MB = Metop-B

This change will not be performed during Critical Weather Day (CWD).M-B Additionally, the contents of this release are subject to change based on user readiness, customer feedback, and management approval.M-B Additional ESPC notifications will provide further details and updates concerning this release.M-B User feedback and questions should be emailed to John Sapper (

Contact Information: M-BFor information on the status of this work, please contact John Sapper or ESPC Operations at or 301-817-3880

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


This message was sent to You have been sent this and other notifications because you have opted in to receive it.M-B If you wish to unsubscribe please contact the ESPC Help Desk at or (301) 817-3880.M-B Please note: it may take up to two business days to process your unsubscribe request.