Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 31.  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   22:46:43   (   0.00,-137.33) (  -0.69,-140.59)  370.60                80
 01/01/2023   22:30:37   (   0.01,-137.32) (   0.27,-136.05)  144.96                80
 01/03/2023   10:52:26   (  -0.01,-137.32) (   0.87,-141.33)  457.06                80
 01/04/2023   10:31:00   (  -0.01,-137.30) (  -0.10,-136.79)   57.98                80
 01/06/2023   22:34:12   (   0.01,-137.27) (  -0.04,-137.58)   34.71                80
 01/07/2023   22:18:06   (   0.01,-137.25) (   0.93,-133.04)  480.01                80
 01/09/2023   10:39:54   (  -0.00,-137.24) (   0.26,-138.31)  123.08                80
 01/10/2023   10:18:29   (  -0.00,-137.22) (  -0.77,-133.78)  391.39                80
 01/11/2023   22:40:25   (  -0.00,-137.19) (  -0.45,-139.08)  216.84                80
 01/12/2023   22:24:20   (  -0.00,-137.17) (   0.59,-134.56)  297.45                80
 01/14/2023   10:46:07   (   0.00,-137.14) (   0.60,-139.83)  306.33                80