Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 10.  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)
 08/10/2023   10:44:06   (  -0.00,-137.01) (   0.63,-139.71)  308.51                80
 08/11/2023   10:22:41   (   0.00,-137.00) (  -0.41,-135.18)  208.23                80
 08/12/2023   22:44:35   (  -0.01,-137.00) (  -0.76,-140.48)  395.68                80
 08/13/2023   22:28:29   (  -0.01,-137.00) (   0.22,-135.93)  120.83                80
 08/15/2023   10:50:14   (   0.01,-136.98) (   0.98,-141.19)  480.05                80
 08/16/2023   10:28:49   (   0.02,-136.98) (  -0.07,-136.66)   36.26                80
 08/18/2023   22:31:56   (  -0.02,-136.96) (  -0.10,-137.42)   52.30                80
 08/19/2023   22:15:50   (  -0.02,-136.95) (   0.90,-132.88)  463.72                80
 08/21/2023   10:37:35   (   0.02,-136.93) (   0.30,-138.14)  138.07                80
 08/22/2023   10:16:09   (   0.02,-136.92) (  -0.70,-133.60)  377.40                80
 08/23/2023   22:38:03   (  -0.02,-136.89) (  -0.45,-138.91)  228.65                80