Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 1.  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)
 05/02/2023   08:37:48   (   0.00,-104.75) (   0.72,-107.98)  368.76                80
 05/03/2023   08:16:24   (   0.00,-104.75) (  -0.32,-103.46)  148.06                80
 05/04/2023   20:38:22   (  -0.00,-104.77) (  -0.87,-108.77)  455.71                80
 05/05/2023   20:22:17   (  -0.00,-104.78) (   0.11,-104.24)   61.22                80
 05/08/2023   08:25:22   (  -0.00,-104.79) (   0.04,-104.99)   22.63                80
 05/09/2023   08:03:59   (  -0.01,-104.79) (  -1.01,-100.47)  493.40                80
 05/10/2023   20:25:56   (   0.02,-104.80) (  -0.17,-105.78)  111.66                80
 05/11/2023   20:09:51   (   0.01,-104.80) (   0.82,-101.25)  405.11                80
 05/13/2023   08:31:40   (  -0.00,-104.81) (   0.38,-106.52)  194.66                80
 05/14/2023   08:10:15   (   0.00,-104.82) (  -0.62,-101.99)  321.94                80