Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 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)
 06/25/2023   08:25:23   (  -0.00,-104.73) (   0.07,-105.06)   37.21                80
 06/26/2023   08:03:57   (  -0.00,-104.73) (  -0.92,-100.52)  479.39                80
 06/27/2023   20:25:54   (   0.01,-104.72) (  -0.23,-105.83)  125.86                80
 06/28/2023   20:09:48   (   0.01,-104.73) (   0.76,-101.29)  391.00                80
 06/30/2023   08:31:36   (  -0.01,-104.74) (   0.39,-106.57)  207.74                80
 07/01/2023   08:10:10   (  -0.01,-104.74) (  -0.60,-102.03)  308.44                80
 07/02/2023   20:32:05   (   0.02,-104.72) (  -0.60,-107.33)  298.25                80
 07/03/2023   20:16:01   (   0.02,-104.72) (   0.46,-102.81)  218.08                80
 07/05/2023   08:37:47   (  -0.02,-104.73) (   0.74,-108.07)  380.71                80
 07/06/2023   08:16:22   (  -0.02,-104.73) (  -0.26,-103.53)  135.55                80
 07/07/2023   20:38:17   (   0.02,-104.71) (  -0.93,-108.83)  471.23                80
 07/08/2023   20:22:12   (   0.02,-104.71) (   0.08,-104.30)   45.73                80