Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 24.  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)
 04/25/2023   10:48:15   (   0.00,-136.97) (   0.97,-141.21)  483.64                80
 04/26/2023   10:32:09   (   0.00,-136.96) (  -0.07,-136.68)   32.38                80
 04/28/2023   22:32:34   (  -0.00,-136.92) (  -0.10,-137.43)   58.53                80
 04/29/2023   22:16:27   (  -0.00,-136.90) (   0.89,-132.89)  457.28                80
 05/01/2023   10:35:31   (  -0.00,-136.89) (   0.27,-138.15)  143.04                80
 05/02/2023   10:19:24   (   0.00,-136.87) (  -0.73,-133.60)  372.57                80
 05/03/2023   22:38:36   (  -0.00,-136.83) (  -0.46,-138.89)  234.85                80
 05/04/2023   22:22:29   (   0.00,-136.81) (   0.54,-134.35)  280.33                80
 05/06/2023   10:41:32   (  -0.00,-136.79) (   0.65,-139.60)  321.36                80
 05/07/2023   10:25:24   (  -0.01,-136.76) (  -0.36,-135.06)  193.13                80