Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 30.  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)
 12/31/2022   22:46:42   (  -0.01,-137.33) (  -0.74,-140.58)  370.15                80
 01/01/2023   22:30:38   (  -0.02,-137.33) (   0.29,-136.05)  145.63                80
 01/03/2023   10:52:25   (   0.02,-137.32) (   0.91,-141.32)  456.08                80
 01/04/2023   10:31:00   (   0.02,-137.31) (  -0.12,-136.80)   59.14                80
 01/06/2023   22:34:11   (  -0.02,-137.28) (  -0.09,-137.57)   33.22                80
 01/07/2023   22:18:07   (  -0.01,-137.26) (   0.94,-133.04)  481.51                80
 01/09/2023   10:39:54   (   0.01,-137.25) (   0.25,-138.31)  121.47                80
 01/10/2023   10:18:30   (   0.00,-137.23) (  -0.78,-133.79)  392.91                80
 01/11/2023   22:43:05   (  -0.00,-137.20) (  -0.45,-139.09)  215.22                80
 01/12/2023   22:21:40   (   0.00,-137.18) (   0.59,-134.56)  299.03                80