Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 3.  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)
 05/03/2023   08:16:23   (   0.00,-104.74) (  -0.27,-103.45)  146.99                80
 05/04/2023   20:38:21   (  -0.00,-104.76) (  -0.93,-108.76)  456.80                80
 05/05/2023   20:22:17   (  -0.00,-104.76) (   0.12,-104.24)   59.98                80
 05/08/2023   08:25:22   (  -0.00,-104.77) (   0.03,-104.99)   24.45                80
 05/09/2023   08:03:58   (  -0.01,-104.77) (  -0.96,-100.46)  491.43                80
 05/10/2023   20:25:55   (   0.02,-104.78) (  -0.22,-105.77)  113.64                80
 05/11/2023   20:09:51   (   0.01,-104.78) (   0.83,-101.25)  402.87                80
 05/13/2023   08:31:40   (  -0.01,-104.79) (   0.36,-106.52)  197.36                80
 05/14/2023   08:10:15   (  -0.01,-104.79) (  -0.63,-101.99)  319.06                80
 05/15/2023   20:32:13   (   0.01,-104.79) (  -0.54,-107.30)  285.85                80
 05/16/2023   20:16:08   (   0.02,-104.80) (   0.46,-102.77)  230.93                80