Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 25.  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)
 09/25/2023   20:37:49   (   0.02,-104.68) (  -0.93,-108.80)  471.05                80
 09/26/2023   20:21:45   (   0.02,-104.68) (   0.10,-104.28)   45.62                80
 09/29/2023   08:24:48   (  -0.01,-104.71) (   0.04,-105.02)   34.47                80
 09/30/2023   08:03:22   (  -0.01,-104.72) (  -0.94,-100.48)  482.28                80
 10/01/2023   20:25:19   (   0.01,-104.69) (  -0.23,-105.79)  124.98                80
 10/02/2023   20:09:13   (   0.01,-104.69) (   0.76,-101.25)  391.84                80
 10/04/2023   08:31:00   (  -0.00,-104.73) (   0.40,-106.52)  204.41                80
 10/05/2023   08:09:35   (  -0.00,-104.73) (  -0.59,-101.99)  312.17                80
 10/06/2023   20:31:31   (   0.00,-104.70) (  -0.56,-107.30)  295.49                80
 10/07/2023   20:15:26   (   0.00,-104.70) (   0.43,-102.76)  221.38                80