Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 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)
 06/02/2023   10:38:37   (  -0.01,-137.03) (   0.26,-138.31)  145.43                80
 06/03/2023   10:17:13   (  -0.02,-137.03) (  -0.76,-133.78)  370.54                80
 06/04/2023   22:39:09   (   0.02,-137.01) (  -0.44,-139.08)  236.04                80
 06/05/2023   22:23:05   (   0.03,-137.00) (   0.59,-134.56)  279.42                80
 06/07/2023   10:42:12   (  -0.03,-137.00) (   0.60,-139.82)  322.08                80
 06/08/2023   10:26:08   (  -0.03,-136.99) (  -0.43,-135.30)  193.09                80
 06/09/2023   22:45:24   (   0.03,-136.96) (  -0.76,-140.60)  414.50                80
 06/10/2023   22:29:18   (   0.03,-136.95) (   0.21,-136.06)  100.69                80
 06/13/2023   10:32:21   (  -0.04,-136.93) (  -0.06,-136.80)   13.78                80