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)
 12/03/2023   08:04:07   (   0.01,-104.67) (  -0.91,-100.67)  456.24                80
 12/04/2023   20:26:03   (   0.01,-104.64) (  -0.31,-105.97)  151.53                80
 12/05/2023   20:10:00   (   0.02,-104.64) (   0.75,-101.45)  364.76                80
 12/07/2023   08:31:48   (  -0.02,-104.67) (   0.44,-106.72)  233.17                80
 12/08/2023   08:10:23   (  -0.02,-104.67) (  -0.56,-102.18)  282.95                80
 12/09/2023   20:32:20   (   0.01,-104.64) (  -0.64,-107.48)  324.36                80
 12/10/2023   20:16:15   (  -0.01,-104.64) (   0.37,-102.95)  192.24                80
 12/12/2023   08:38:04   (   0.02,-104.66) (   0.80,-108.22)  405.49                80
 12/13/2023   08:16:39   (   0.01,-104.66) (  -0.21,-103.69)  110.13                80
 12/14/2023   20:38:35   (  -0.01,-104.62) (  -0.97,-109.00)  498.66                80
 12/15/2023   20:22:31   (  -0.00,-104.61) (   0.05,-104.47)   17.16                80