Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 04/01/2023   22:39:39   (  -0.01,-136.98) (  -0.46,-139.10)  240.15                80
 04/02/2023   22:23:33   (  -0.01,-136.98) (   0.53,-134.55)  276.91                80
 04/04/2023   10:45:18   (   0.02,-137.00) (   0.66,-139.82)  321.44                80
 04/05/2023   10:23:52   (   0.02,-137.00) (  -0.39,-135.29)  195.29                80
 04/06/2023   22:48:26   (  -0.02,-136.98) (  -0.83,-140.58)  410.53                80
 04/07/2023   22:29:39   (  -0.01,-136.97) (   0.17,-136.04)  105.80                80
 04/09/2023   10:51:25   (   0.02,-136.97) (   1.01,-141.30)  493.93                80
 04/10/2023   10:29:58   (   0.02,-136.96) (   0.01,-136.76)   21.98                80
 04/12/2023   22:33:06   (  -0.03,-136.90) (  -0.14,-137.53)   70.69                80
 04/13/2023   22:16:58   (  -0.03,-136.88) (   0.81,-132.98)  444.47                80
 04/15/2023   10:36:04   (   0.04,-136.87) (   0.35,-138.24)  156.82                80