Update #3: On November 16, 2022, the GOES-17 and GOES-18 interleave will end at 17:01z. At the conclusion of Interleave, GOES-17 ABI and non-ABI data (delivered via PDA) will be unavailable for a period of approximately 20 minutes. GOES-18 L1b data (sent to LZSS) and L2+ products (delivered via PDA) will be out for approximately 5 hours. GOES-17 KPP distribution will not be impacted.

Update #2: This is a reminder that the GOES-WEST Operational interleave of GOES-17 and GOES-18 is starting tomorrow, October 13, at 16:01 UTC

Update #1: The following changes (outages) to GOES-18 PLPT and GOES-17 to PDA CLASS will occur at the beginning of the interleave:

On October 11, 2022 at 1300-1800 UTC:

- GOES-18 L0 will be available via LZSS and GeoCloud in real-time

- No GOES-18 L1b/L2+ will be available via LZSS, GeoCloud, PDA, CLASS in real-time nor retroactively

On October 11, 2022 at 1300 - October 13, 2022 at 1601 UTC:

- GOES-18 L0 will be available via LZSS and GeoCloud in real-time

- GOES-18 L1b/L2+ will be backfilled to LZSS and GeoCloud retroactively

- No GOES-18 data will be available via PDA & CLASS in real-time nor retroactively

On October 13, 2022 at 1601-1621 UTC:

- GOES-17 ABI and GOES-18 non-ABI (GLM, EXIS, SEISS, GMAG, SUVI) L0 will be available via LZSS and GeoCloud in real-time

- No GOES-17 ABI and GOES-18 non-ABI (GLM, EXIS, SEISS, GMAG, SUVI) will be available via PDA & CLASS in real-time nor retroactively

Unrelated to interleave, the original message includes a target date for GOES-18 to transition into the GOES-West operational role, which has been moved from January 3, 2023, to January 4, 2023.

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Topic: GOES-WEST Operational Interleave of GOES-17 and GOES-18 October 13, 2022 - November 16, 2022

Date/Time Issued: November 10, 2022 1524 UTC

Product(s) or Data Impacted: GOES-17 ABI L1b Radiances and L2 Cloud and Moisture Imagery replaced with GOES-18 ABI L1b Radiances and L2 Cloud and Moisture Imagery

Date/Time of Initial Impact: October 13, 2022 at 16:01 UTC

Date/Time of Expected End: November 16, 2022 at 17:01 UTC

Length of Outage: N/A

Details/Specifics of Change:

On October 13, 2022 at 1601 UTC, the operational interleave of GOES-17 and GOES-18 will be implemented. At the time of the operational GOES-18 operational interleave, GOES-18 will be located in the West orbital slot (137.0 degrees West), 0.3 degrees from GOES-17 (at 137.3 degrees West).

The interleave configuration entails populating the operational GOES-17 GRB (GOES Rebroadcast) service with an “interleave” of GOES-18 ABI data (replacing the GOES-17 ABI data) and GOES-17 GLM and space weather data. See slide #8 in this hyperlink for the key to GRB Spacecraft IDs and Metadata: https://www.ospo.noaa.gov/Operations/GOES/documents/GOES-18%20T2O%20Schedule%2020220927.pdf

In order to ensure continuity of GOES-West ABI operations, GRB users are advised to ensure their end-processing will accept a different ABI platform ID (G18 rather than G17) and instrument ID (FM3 rather than FM2). More information on global attributes is available in the Product User’s Guide (PUG) Volume 4 for GRB: https://www.goes-r.gov/users/docs/PUG-GRB-vol4.pdf

The GOES-West data content of each product distribution service (e.g., GRB, AWIPS, PDA, CLASS, NODD, HRIT, GNC-A, etc.) during interleave period is listed on slide #7 here: https://www.ospo.noaa.gov/Operations/GOES/documents/GOES-18%20T2O%20Schedule%2020220927.pdf

GOES-18 ABI L1b Radiances and L2 Cloud and Moisture Imagery have achieved Provisional maturity and due to the operational status of interleave, the data are fit for operational use and may be shared without restriction. Once interleave concludes on November 16th, GOES-18 ABI data will not be considered operational as the GOES-18 spacecraft will not have 24x7 support until January 4, 2023.

Note regarding GOES-17 ABI: GOES-17 ABI will be operating continuously until the GOES-West transition from GOES-17 to GOES-18 in January 2023. The GOES-17 ABI data will be available as they normally are through PDA subscriptions. Continuous GOES-17 ABI operations include the Oct-Nov interleave periods when GOES-17 ABI will have multiple focal plane module temperature (FPM) mitigations including the cooling timeline and multiple FPM set points adjustments.

This interleave implementation will proceed regardless of Critical Weather Day declaration.

Contact Information for Further Information: SPSD.UserServices.noaa.gov

Websites for Applicable Information:

https://www.ospo.noaa.gov/Operations/GOES/transition.html

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