Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 11.  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)
 08/11/2023   10:22:41   (  -0.00,-137.00) (  -0.43,-135.18)  208.16                80
 08/12/2023   22:44:34   (  -0.00,-137.00) (  -0.81,-140.47)  395.82                80
 08/13/2023   22:28:29   (  -0.01,-136.99) (   0.24,-135.94)  120.63                80
 08/15/2023   10:50:14   (   0.01,-136.98) (   0.97,-141.20)  480.45                80
 08/16/2023   10:28:49   (   0.01,-136.98) (  -0.08,-136.67)   35.81                80
 08/18/2023   22:31:57   (  -0.01,-136.96) (  -0.10,-137.43)   52.89                80
 08/19/2023   22:15:50   (  -0.01,-136.95) (   0.90,-132.88)  463.03                80
 08/21/2023   10:37:36   (   0.01,-136.93) (   0.30,-138.14)  138.98                80
 08/22/2023   10:16:10   (   0.01,-136.91) (  -0.75,-133.62)  376.41                80
 08/23/2023   22:38:03   (  -0.01,-136.89) (  -0.46,-138.90)  229.71                80
 08/24/2023   22:21:57   (  -0.01,-136.87) (   0.53,-134.36)  285.09                80