Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 17.  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)
 04/18/2023   20:38:31   (  -0.01,-104.73) (  -0.92,-108.77)  461.10                80
 04/19/2023   20:22:25   (  -0.01,-104.73) (   0.10,-104.24)   56.34                80
 04/22/2023   08:25:23   (   0.01,-104.73) (   0.08,-104.96)   25.98                80
 04/23/2023   08:03:56   (   0.02,-104.73) (  -0.94,-100.42)  491.35                80
 04/24/2023   20:25:49   (  -0.01,-104.74) (  -0.23,-105.72)  111.56                80
 04/25/2023   20:09:43   (  -0.01,-104.74) (   0.80,-101.18)  405.96                80
 04/27/2023   08:31:27   (   0.01,-104.74) (   0.39,-106.44)  193.44                80
 04/28/2023   08:10:00   (   0.02,-104.74) (  -0.59,-101.89)  324.01                80
 04/29/2023   20:31:53   (  -0.01,-104.75) (  -0.56,-107.19)  278.77                80
 04/30/2023   20:15:47   (  -0.02,-104.75) (   0.48,-102.66)  239.14                80