Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2022   22:18:07   (  -0.01,-137.34) (   0.95,-132.99)  495.12                80
 12/24/2022   10:39:55   (   0.01,-137.34) (   0.21,-138.27)  106.54                80
 12/25/2022   10:18:31   (   0.01,-137.33) (  -0.81,-133.75)  409.04                80
 12/26/2022   22:43:07   (  -0.02,-137.32) (  -0.39,-139.05)  197.06                80
 12/27/2022   22:21:43   (  -0.01,-137.32) (   0.63,-134.53)  318.35                80
 12/29/2022   10:46:10   (   0.02,-137.31) (   0.57,-139.80)  283.82                80
 12/30/2022   10:24:46   (   0.01,-137.30) (  -0.45,-135.27)  231.47                80
 12/31/2022   22:49:22   (  -0.02,-137.28) (  -0.73,-140.58)  374.93                80
 01/01/2023   22:27:56   (  -0.02,-137.27) (   0.23,-136.04)  140.10                80
 01/03/2023   10:52:25   (   0.02,-137.26) (   0.91,-141.32)  462.93                80
 01/04/2023   10:30:59   (   0.02,-137.24) (  -0.06,-136.78)   51.63                80