Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 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)
 12/26/2023   20:16:18   (  -0.00,-104.67) (   0.40,-102.95)  195.75                80
 12/28/2023   08:38:05   (   0.01,-104.70) (   0.80,-108.22)  401.30                80
 12/29/2023   08:16:40   (   0.01,-104.69) (  -0.23,-103.69)  115.21                80
 12/30/2023   20:38:36   (  -0.02,-104.66) (  -0.98,-108.98)  492.12                80
 12/31/2023   20:22:31   (  -0.02,-104.67) (   0.05,-104.45)   24.93                80
 01/03/2024   08:25:33   (   0.02,-104.71) (   0.15,-105.18)   54.47                80
 01/04/2024   08:04:09   (   0.02,-104.71) (  -0.90,-100.65)  462.36                80
 01/05/2024   20:26:04   (  -0.02,-104.68) (  -0.30,-105.95)  144.74                80
 01/06/2024   20:09:58   (  -0.02,-104.68) (   0.69,-101.41)  372.19                80
 01/08/2024   08:31:46   (   0.03,-104.71) (   0.48,-106.68)  223.95                80