Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 26.  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)
 12/26/2022   22:40:27   (  -0.02,-137.33) (  -0.40,-139.05)  196.30                80
 12/27/2022   22:24:23   (  -0.02,-137.32) (   0.62,-134.52)  319.38                80
 12/29/2022   10:46:10   (   0.02,-137.31) (   0.59,-139.79)  282.75                80
 12/30/2022   10:24:45   (   0.02,-137.31) (  -0.43,-135.27)  232.79                80
 12/31/2022   22:46:42   (  -0.02,-137.30) (  -0.76,-140.57)  373.08                80
 01/01/2023   22:30:37   (  -0.03,-137.29) (   0.26,-136.05)  142.18                80
 01/03/2023   10:52:25   (   0.03,-137.27) (   0.94,-141.32)  460.80                80
 01/04/2023   10:31:00   (   0.03,-137.26) (  -0.08,-136.79)   53.98                80
 01/06/2023   22:36:51   (  -0.04,-137.22) (  -0.13,-137.56)   38.75                80
 01/07/2023   22:15:26   (  -0.04,-137.21) (   0.90,-133.03)  475.56                80