Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 04/17/2023   08:16:38   (   0.01,-104.72) (  -0.30,-103.49)  141.34                80
 04/18/2023   20:38:32   (  -0.01,-104.73) (  -0.90,-108.78)  461.09                80
 04/19/2023   20:22:25   (  -0.00,-104.74) (   0.12,-104.24)   56.39                80
 04/22/2023   08:25:23   (   0.00,-104.73) (   0.06,-104.96)   26.11                80
 04/23/2023   08:03:57   (   0.01,-104.73) (  -0.97,-100.43)  491.28                80
 04/24/2023   20:25:50   (  -0.00,-104.74) (  -0.21,-105.72)  111.54                80
 04/25/2023   20:09:42   (  -0.01,-104.74) (   0.76,-101.18)  406.02                80
 04/27/2023   08:31:28   (   0.01,-104.74) (   0.37,-106.44)  193.41                80
 04/28/2023   08:10:00   (   0.01,-104.74) (  -0.61,-101.90)  324.04                80
 04/29/2023   20:31:53   (  -0.01,-104.75) (  -0.55,-107.20)  278.67                80