Topic: Transition of NSOF Operations from A-String to CBU String

Date/Time Issued: November 28, 2020 0035Z

Product(s) or Data Impacted: Real-time Data and End User Data Products (Latency)

Date/Time of Initial Impact: December 2, 2020 15:00:00z (JDAY 336)

Back-Orbit | Start of Window (GMT) | End of Window (GMT) | Data Sync OFF
12/2/2020 (Primary) | 12/2/2020 15:04:00 | 12/2/2020 16:24:00 | 13:34:00
12/2/2020 (Backup) | 12/2/2020 16:41:00 | 12/2/2020 18:04:19 | 15:11:00
12/4/2020 (Contingency Day - Primary) | 12/4/2020 14:19:00 | 12/4/2020 15:42:00 | 12:49.00
12/4/2020 (Contingency Day - Backup) | 12/4/2020 16:00:00 | 12/4/2020 17:25:00 | 14:30:00

Date/Time of Expected End: December 2, 2020 06:00:00z (JDAY 336) for primary opportunity, December 4, 2020 17:30:00z (JDAY 338) if the contingency day is used.

Length of Outage: 2 Hours per transition opportunity

Details/Specifics of Change: The purpose of this notice is to inform NPP mission segments of the plan to move the JPSS Common Ground System, Command, Control, and Communications operations for the JPSS constellation from A string to CBU String on December 2nd, 2020. A backup date for this activity has been scheduled for December 4th, 2020 in the event the first attempt needs to be waived. NPP, N20, DMSP and GCOM-W1 missions may experience data latency during this transition.