Update #2:  NOAA-21 Stored Mission Data (SMD) passes may incur ~3 hour delays on the days and times detailed below.


Update #1:  NOAA-20 and NOAA-21 Stored Mission Data (SMD) from nighttime (descending) passes may incur half-orbit (~50 minute) delays on the days and times detailed below.


On Oct 7, there may be a scheduled outage at the McMurdo ground station, spanning 10/7 19:00 UTC to 10/8 19:00 UTC.  During that outage, the following revs will have limited or no visibility to the Troll downlink station, which will be covering for McMurdo, and thus the Southern Hemisphere data playback may be delayed until the subsequent Svalbard downlink. This may introduce a half-orbit delay to some data delivery at the following approximate times:

NOAA-21:
(rev 9901) 2024-10-8, 03:57 to 04:47 UTC
(rev 9902) 2024-10-8, 05:37 to 06:28 UTC
(rev 9903) 2024-10-8, 07:17 to 08:07 UTC
(rev 9904) 2024-10-8, 08:57 to 09:48 UTC

NOAA-20:
(rev 35694) 2024-10-8, 04:43 to 05:34 UTC
(rev 35695) 2024-10-8, 06:23 to 07:14 UTC
(rev 35696) 2024-10-8, 08:03 to 08:54 UTC

On Oct 10, there may be a scheduled outage at the McMurdo ground station, spanning 10/10 19:00 UTC to 10/11 19:00 UTC.  During that outage, the following revs will have limited or no visibility to the Troll downlink station, which will be covering for McMurdo, and thus the Southern Hemisphere data playback may be delayed until the subsequent Svalbard downlink. This may introduce a half-orbit delay to some data delivery at the following approximate times:

NOAA-21:
(rev 9944) 2024-10-11, 04:41 to 05:32 UTC
(rev 9945) 2024-10-11, 06:21 to 07:12 UTC
(rev 9946) 2024-10-11, 08:01 to 08:51 UTC

NOAA-20:
(rev 35736) 2024-10-11, 03:47 to 04:37 UTC 
(rev 35737) 2024-10-11, 05:27 to 06:18 UTC 
(rev 35738) 2024-10-11, 07:07 to 07:58 UTC 
(rev 35739) 2024-10-11, 08:47 to 09:38 UTC 

Future McMurdo outages, on or near Oct 29 - Nov 3, may also result in data delivery delays, to be detailed in a subsequent update.

Topic: Intermittent delays expected in NOAA-20 and NOAA-21 Science Mission Data

 

Date/Time IssuedOctober 08, 2024 0622Z 

 
Product(s) or Data Impacted: All Science Mission Data from NOAA-20 and NOAA-21 descending (nighttime) passes


Date/Time Initial Impact: October 07, 2024 0000Z  J/Day 281

Date/Time of Expected End:  November 2, 2024 0000Z  J/Day 327

Length of Event: 26 days

Details/Specifics of Change: Between Oct. 7, 2024, and Nov. 1, 2024, about 4 times per day, Science MIssion Data (SMD) from the descending (nighttime) passes of the NOAA-20 and NOAA-21 satellites may incur delays of about 50 minutes, due to maintenance at the McMurdo (Antarctica) ground station. An update will be made to this notice when further SMD delay dates and times are available.

 

This will NOT have any effect on

  • SMD from ascending (daytime) passes of NOAA-20 and NOAA-21;

  • Any SMD from the S-NPP satellite; or

  • Any High-Rate Data (HRD) / Direct Broadcast.


User feedback and questions should be directed to John Evans, LEO Data Operations Manager, NESDIS/OSPO/SPSD <john.d.evans@noaa.gov>


Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880

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