Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 7 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)
 07/27/2023   22:44:54   (  -0.00,-137.01) (  -0.81,-140.53)  401.69                80
 07/28/2023   22:28:49   (  -0.00,-137.01) (   0.21,-136.00)  114.83                80
 07/30/2023   10:50:35   (   0.01,-137.00) (   0.96,-141.26)  485.51                80
 07/31/2023   10:29:09   (   0.01,-136.99) (  -0.07,-136.73)   30.53                80
 08/02/2023   22:32:17   (  -0.02,-136.96) (  -0.16,-137.48)   59.98                80
 08/03/2023   22:16:12   (  -0.02,-136.95) (   0.88,-132.95)  455.72                80
 08/05/2023   10:37:58   (   0.02,-136.94) (   0.29,-138.22)  145.47                80
 08/06/2023   10:16:32   (   0.02,-136.93) (  -0.69,-133.68)  369.99                80
 08/07/2023   22:38:26   (  -0.03,-136.90) (  -0.50,-138.97)  236.74                80
 08/08/2023   22:22:21   (  -0.03,-136.88) (   0.54,-134.45)  278.43                80
 08/10/2023   10:44:06   (   0.03,-136.86) (   0.68,-139.70)  323.67                80