Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 27.  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)
 06/28/2023   10:51:01   (  -0.02,-137.02) (   0.93,-141.34)  491.52                80
 06/29/2023   10:29:35   (  -0.02,-137.02) (  -0.07,-136.80)   24.78                80
 07/01/2023   22:32:45   (   0.01,-136.99) (  -0.14,-137.56)   65.76                80
 07/02/2023   22:16:41   (   0.01,-136.98) (   0.92,-133.04)  449.73                80
 07/04/2023   10:38:27   (  -0.01,-136.97) (   0.29,-138.30)  151.82                80
 07/05/2023   10:19:42   (  -0.01,-136.96) (  -0.72,-133.77)  363.21                80
 07/06/2023   22:38:57   (   0.01,-136.93) (  -0.47,-139.07)  244.37                80
 07/07/2023   22:22:52   (   0.00,-136.91) (   0.53,-134.53)  270.81                80
 07/09/2023   10:41:58   (   0.00,-136.90) (   0.66,-139.80)  330.98                80
 07/10/2023   10:25:52   (   0.00,-136.88) (  -0.34,-135.26)  183.88                80