Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 8 19.  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)
 08/19/2023   20:31:23   (  -0.01,-104.69) (  -0.54,-107.22)  286.99                80
 08/20/2023   20:15:18   (  -0.01,-104.69) (   0.44,-102.68)  229.18                80
 08/22/2023   08:37:08   (   0.01,-104.72) (   0.71,-107.96)  369.56                80
 08/23/2023   08:15:43   (   0.01,-104.71) (  -0.27,-103.43)  146.15                80
 08/24/2023   20:37:41   (  -0.02,-104.68) (  -0.90,-108.74)  462.04                80
 08/25/2023   20:21:36   (  -0.02,-104.68) (   0.09,-104.21)   53.70                80
 08/28/2023   08:24:40   (   0.03,-104.69) (   0.11,-104.95)   29.91                80
 08/29/2023   08:03:16   (   0.03,-104.69) (  -0.95,-100.43)  485.58                80
 08/30/2023   20:25:13   (  -0.03,-104.65) (  -0.26,-105.73)  122.82                80
 08/31/2023   20:09:08   (  -0.03,-104.65) (   0.74,-101.20)  393.11                80