Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 2.  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)
 04/02/2023   22:23:33   (  -0.01,-136.98) (   0.54,-134.56)  276.91                80
 04/04/2023   10:45:18   (   0.02,-137.00) (   0.65,-139.82)  321.45                80
 04/05/2023   10:23:52   (   0.02,-137.00) (  -0.34,-135.28)  195.28                80
 04/06/2023   22:48:26   (  -0.02,-136.98) (  -0.83,-140.58)  410.57                80
 04/07/2023   22:29:39   (  -0.01,-136.97) (   0.17,-136.04)  105.74                80
 04/09/2023   10:51:25   (   0.02,-136.97) (   1.01,-141.30)  494.00                80
 04/10/2023   10:29:59   (   0.02,-136.96) (  -0.05,-136.78)   21.89                80
 04/12/2023   22:33:06   (  -0.03,-136.90) (  -0.15,-137.53)   70.79                80
 04/13/2023   22:17:00   (  -0.03,-136.88) (   0.86,-132.99)  444.31                80
 04/15/2023   10:36:04   (   0.04,-136.87) (   0.37,-138.24)  157.03                80
 04/16/2023   10:19:57   (   0.04,-136.85) (  -0.65,-133.70)  357.89                80