Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 3.  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)
 12/04/2023   20:26:03   (   0.01,-104.64) (  -0.29,-105.97)  151.38                80
 12/05/2023   20:09:59   (   0.02,-104.64) (   0.71,-101.44)  364.87                80
 12/07/2023   08:31:47   (  -0.02,-104.67) (   0.47,-106.71)  233.16                80
 12/08/2023   08:10:24   (  -0.02,-104.67) (  -0.59,-102.19)  283.01                80
 12/09/2023   20:32:20   (   0.00,-104.64) (  -0.61,-107.49)  324.19                80
 12/10/2023   20:16:15   (  -0.01,-104.64) (   0.35,-102.95)  192.39                80
 12/12/2023   08:38:03   (   0.02,-104.66) (   0.82,-108.22)  405.46                80
 12/13/2023   08:16:39   (   0.01,-104.66) (  -0.19,-103.69)  110.16                80
 12/14/2023   20:38:35   (  -0.01,-104.62) (  -0.99,-108.99)  498.53                80
 12/15/2023   20:22:30   (  -0.00,-104.61) (   0.04,-104.46)   17.20                80