Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 7 28.  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)
 07/29/2023   20:25:29   (   0.01,-104.70) (  -0.22,-105.77)  121.18                80
 07/30/2023   20:09:22   (   0.00,-104.70) (   0.75,-101.22)  395.43                80
 08/01/2023   08:31:08   (   0.00,-104.72) (   0.42,-106.49)  202.30                80
 08/02/2023   08:09:43   (   0.00,-104.71) (  -0.61,-101.96)  313.97                80
 08/03/2023   20:31:37   (  -0.00,-104.68) (  -0.59,-107.25)  293.40                80
 08/04/2023   20:15:32   (  -0.00,-104.68) (   0.45,-102.72)  223.47                80
 08/06/2023   08:37:18   (   0.00,-104.71) (   0.72,-107.99)  373.06                80
 08/07/2023   08:15:52   (   0.01,-104.71) (  -0.26,-103.45)  143.64                80
 08/08/2023   20:37:46   (  -0.01,-104.68) (  -0.93,-108.74)  463.82                80
 08/09/2023   20:21:41   (  -0.01,-104.68) (   0.11,-104.21)   53.20                80