Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 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)
 12/31/2023   20:22:31   (   0.01,-104.66) (   0.06,-104.45)   23.33                80
 01/03/2024   08:25:34   (  -0.02,-104.69) (   0.09,-105.19)   57.42                80
 01/04/2024   08:04:10   (  -0.02,-104.69) (  -0.95,-100.66)  459.07                80
 01/05/2024   20:26:05   (   0.02,-104.66) (  -0.25,-105.96)  148.01                80
 01/06/2024   20:09:59   (  -0.00,-104.66) (   0.73,-101.42)  369.16                80
 01/08/2024   08:31:47   (   0.02,-104.68) (   0.44,-106.69)  227.74                80
 01/09/2024   08:10:21   (   0.02,-104.68) (  -0.55,-102.15)  288.35                80
 01/10/2024   20:32:17   (  -0.02,-104.64) (  -0.65,-107.44)  319.98                80
 01/11/2024   20:16:11   (  -0.01,-104.63) (   0.35,-102.91)  196.23                80
 01/13/2024   08:37:58   (   0.01,-104.66) (   0.82,-108.17)  401.00                80