Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2023   06:31:22   (  -0.02, -75.21) (   0.28, -76.62)  160.14                80
 12/25/2023   06:09:56   (  -0.01, -75.21) (  -0.69, -72.08)  356.67                80
 12/26/2023   18:31:53   (   0.01, -75.22) (  -0.49, -77.38)  246.62                80
 12/27/2023   18:15:48   (   0.00, -75.23) (   0.54, -72.85)  270.69                80
 12/29/2023   06:37:36   (  -0.01, -75.23) (   0.65, -78.12)  328.72                80
 12/30/2023   06:16:11   (  -0.00, -75.24) (  -0.38, -73.59)  188.85                80
 12/31/2023   18:38:07   (   0.01, -75.26) (  -0.78, -78.89)  413.32                80
 01/01/2024   18:22:02   (   0.01, -75.28) (   0.20, -74.35)  104.95                80
 01/03/2024   06:43:49   (  -0.01, -75.30) (   0.98, -79.62)  492.59                80
 01/04/2024   06:22:25   (  -0.01, -75.32) (  -0.06, -75.09)   25.89                80