Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 16.  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)
 10/16/2023   22:28:28   (  -0.00,-137.00) (   0.21,-135.98)  115.89                80
 10/18/2023   10:50:14   (   0.02,-137.02) (   0.95,-141.25)  482.20                80
 10/19/2023   10:28:49   (   0.01,-137.02) (  -0.07,-136.72)   34.43                80
 10/21/2023   22:34:38   (  -0.01,-137.00) (  -0.12,-137.48)   54.89                80
 10/22/2023   22:13:12   (  -0.00,-136.99) (   0.91,-132.95)  461.19                80
 10/24/2023   10:37:37   (   0.01,-136.99) (   0.30,-138.20)  138.70                80
 10/25/2023   10:16:12   (   0.00,-136.98) (  -0.73,-133.67)  377.39                80
 10/26/2023   22:40:46   (  -0.02,-136.96) (  -0.46,-138.96)  228.38                80
 10/27/2023   22:19:20   (  -0.02,-136.95) (   0.52,-134.42)  287.62                80
 10/29/2023   10:43:46   (   0.03,-136.94) (   0.62,-139.69)  312.84                80
 10/30/2023   10:22:20   (   0.03,-136.93) (  -0.36,-135.15)  202.62                80