Update #4: Clarification - On September 8, 2022, the GOES-17 and GOES-18 interleave will end at 16:01z. GOES-17 product distribution will not be impacted. GOES-18 L1B delivered via GRB and ABI imagery delivered via AWIPS will both become unavailable until the next interleave period begins on October 13, 2022. GOES-18 products delivered via PDA and downstream services will be out for approximately 6 hours beginning approximately 30 minutes after the end of interleave, but will resume nominally for approved subscriptions according to the GOES-R data access policy. This policy and other GOES-18 information is available at https://www.ospo.noaa.gov/Operations/GOES/documents/GOES-18%20T2O%20Schedule%2020220818.pdf

Update # 3: On September 8, 2022, the GOES-17 and GOES-18 interleave will end at 16:01z. GOES-18 L1B (delivered via GRB and PDA users) and L2+ products (delivered via PDA users) will be out for approximately 6 hours beginning approximately 30 minutes after the end of interleave. GOES-18 KPP and non-ABI production and distribution will not be impacted.

Update #2: The date for the end of the GOES-WEST Operational Interleave of GOES-17 and GOES-18 has changed to September 8, 2022

Update #1: This is a reminder that the GOES-WEST Operational Interleave of GOES-17 and GOES-18 starts on Monday, August 1, 2022 at 1700 UTC

Topic: GOES-WEST Operational Interleave of GOES-17 and GOES-18 August 1, 2022 - September 8, 2022

Date/Time Issued: September 1, 2022 1314 UTC

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

Date/Time of Initial Impact: August 1, 2022 at 1700 UTC

Date/Time of Expected End: September 8, 2022 at TBD Time

Length of Outage: N/A

Details/Specifics of Change:

On August 1, 2022 at 1700 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 #9 here for the key to GRB Spacecraft IDs and Metadata: https://www.ospo.noaa.gov/Operations/GOES/documents/GOES-18%20T2O%20Schedule%2020220610.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 #8 here: https://www.ospo.noaa.gov/Operations/GOES/documents/GOES-18%20T2O%20Schedule%2020220610.pdf

Prior to the start of the interleave period, GOES-18 ABI L1b Radiances and L2 Cloud and Moisture Imagery will achieve Provisional maturity: fit for operational use and may be shared without restriction.

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 it normally is through PDA subscriptions. Continuous GOES-17 ABI operations will include the Aug-Sep and 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.

Additionally, due to the GOES-17/GOES-18 interleave configuration, there will be an ~ 6 hour outage (starting ~ 30 minutes after interleave ends at 16:01 UTC) in the distribution of GOES-18 ABI L1b data to GRB and PDA users and GOES-18 ABI L2+ data to PDA users. GOES-18 KPP and non-ABI production and distribution will not be impacted.

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

Websites for Applicable Information:

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

This message was sent to ESPC.Notification@noaa.gov. You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov or (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request.