Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 23.  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)
 12/24/2023   08:10:25   (   0.02,-104.70) (  -0.52,-102.17)  287.19                80
 12/25/2023   20:32:22   (  -0.02,-104.67) (  -0.65,-107.48)  320.20                80
 12/26/2023   20:16:17   (  -0.02,-104.67) (   0.38,-102.95)  196.39                80
 12/28/2023   08:38:05   (   0.02,-104.70) (   0.82,-108.21)  400.67                80
 12/29/2023   08:16:40   (   0.01,-104.70) (  -0.21,-103.68)  115.68                80
 12/30/2023   20:38:36   (  -0.00,-104.67) (  -0.94,-108.99)  491.72                80
 12/31/2023   20:22:31   (   0.00,-104.67) (   0.04,-104.45)   25.21                80
 01/03/2024   08:25:34   (  -0.01,-104.72) (   0.11,-105.19)   53.92                80
 01/04/2024   08:04:09   (  -0.01,-104.72) (  -0.94,-100.66)  462.95                80
 01/05/2024   20:26:05   (   0.01,-104.69) (  -0.26,-105.96)  143.97                80