Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 4 20.  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)
 04/21/2025   08:38:48   (  -0.01,-104.36) (   0.79,-107.97)  411.87                80
 04/22/2025   08:17:22   (  -0.01,-104.35) (  -0.22,-103.43)  104.99                80
 04/23/2025   20:39:15   (   0.01,-104.38) (  -0.95,-108.73)  494.65                80
 04/24/2025   20:23:09   (   0.01,-104.38) (   0.07,-104.19)   22.73                80
 04/27/2025   08:26:07   (  -0.01,-104.35) (   0.14,-104.90)   63.42                80
 04/28/2025   08:04:40   (  -0.01,-104.34) (  -0.88,-100.36)  453.32                80
 04/29/2025   20:26:33   (   0.01,-104.37) (  -0.26,-105.66)  146.97                80
 04/30/2025   20:10:27   (   0.01,-104.37) (   0.77,-101.12)  370.02                80
 05/02/2025   08:32:11   (  -0.01,-104.33) (   0.46,-106.37)  232.96                80
 05/03/2025   08:10:45   (  -0.01,-104.33) (  -0.57,-101.84)  283.86                80