Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 8.  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)
 12/09/2023   20:32:20   (  -0.00,-104.66) (  -0.62,-107.49)  321.81                80
 12/10/2023   20:16:16   (  -0.00,-104.66) (   0.38,-102.95)  194.80                80
 12/12/2023   08:38:04   (   0.01,-104.69) (   0.80,-108.22)  403.10                80
 12/13/2023   08:16:39   (   0.01,-104.69) (  -0.21,-103.69)  113.03                80
 12/14/2023   20:38:36   (  -0.01,-104.66) (  -0.99,-108.99)  494.53                80
 12/15/2023   20:22:31   (  -0.02,-104.65) (   0.02,-104.46)   21.76                80
 12/18/2023   08:25:35   (   0.01,-104.68) (   0.14,-105.20)   60.10                80
 12/19/2023   08:04:11   (  -0.00,-104.68) (  -0.87,-100.67)  456.03                80
 12/20/2023   20:26:07   (   0.00,-104.65) (  -0.31,-105.97)  151.19                80
 12/21/2023   20:10:03   (  -0.00,-104.65) (   0.71,-101.44)  365.46                80