Topic: Product Change for Advanced Clear-Sky Processor for Oceans (ACSPO) SST from AVHRR


Date/Time Issued: April 11, 2019 1500 UTC


Product(s) or Data Impacted: M-BAll ACSPO AVHRR SST (and aer-sub) Products


Date/Time of Initial Impact: M-BM-BMay 11, 2019 TBD UTC


Date/Time of Expected End: N/A


Length of Outage: M-BM-BN/A


Details/Specifics of Change:

Install ACSPO v2.70

The naming convention and the version number for ACSPO SST AVHRR are scheduled to change on May 11, 2019 with the upgrade to ACSPO v2.70.M-B The changes are as follows:

1) M-BVersion number of ACSPO will change from V2.41 to V2.70.

2) The satellite identifier and the instrument identifier are currently combined in one field and will now be separate fields, delimited by an underscore '_' in the filename.M-B The MetOp satellite identifiers are also changing and the instrument identifier is adding an M-bM-^@M-^XFM-bM-^@M-^Y on the end of AVHRR to indicate FRAC.

(a) The satellite identifier for MetOp-A is changing from M-bM-^@M-^XMTAM-bM-^@M-^Y to M-bM-^@M-^XMAM-bM-^@M-^Y and MetOp-B is changing from M-bM-^@M-^XMTBM-bM-^@M-^Y to M-bM-^@M-^XMBM-bM-^@M-^Y.

(b) M-BThe instrument identifier for FRAC is changing to now use AVHRRF.M-B In the old form, FRAC was not indicated at all.

Given (a) and (b) listed above, the value for the 2 fields is changing for FRAC from 'AVHRRMTA' to 'AVHRRF_MA' and 'AVHRRMTB' to 'AVHRRF_MB'.M-B Examples of the names are below.

Currently the filenames are typically in the following format:

The new format will be as follows:

Users may request sample data by emailing John Sapper (

The content of the product files remains the same with the exception of the addition of a couple metadata parameters mainly for internal use.

This upgrade 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. 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


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