Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 11 30.  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)
 12/02/2023   08:25:31   (  -0.00,-104.67) (   0.09,-105.20)   59.89                80
 12/03/2023   08:04:07   (  -0.00,-104.67) (  -0.90,-100.67)  456.15                80
 12/04/2023   20:26:03   (  -0.00,-104.64) (  -0.32,-105.96)  151.14                80
 12/05/2023   20:09:59   (  -0.00,-104.64) (   0.74,-101.44)  365.40                80
 12/07/2023   08:31:48   (   0.01,-104.67) (   0.44,-106.72)  232.17                80
 12/08/2023   08:10:23   (   0.01,-104.67) (  -0.57,-102.18)  284.13                80
 12/09/2023   20:32:20   (  -0.01,-104.64) (  -0.63,-107.48)  323.49                80
 12/10/2023   20:16:15   (  -0.01,-104.64) (   0.39,-102.95)  192.96                80
 12/12/2023   08:38:02   (   0.02,-104.67) (   0.84,-108.21)  404.55                80
 12/13/2023   08:16:38   (   0.02,-104.66) (  -0.18,-103.68)  111.34                80