Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 15.  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)
 09/15/2023   20:25:19   (  -0.01,-104.68) (  -0.26,-105.77)  124.36                80
 09/16/2023   20:09:15   (  -0.01,-104.69) (   0.75,-101.24)  392.05                80
 09/18/2023   08:31:03   (   0.01,-104.71) (   0.40,-106.52)  206.10                80
 09/19/2023   08:09:39   (   0.01,-104.71) (  -0.62,-101.99)  309.88                80
 09/20/2023   20:31:35   (  -0.01,-104.68) (  -0.58,-107.29)  298.05                80
 09/21/2023   20:15:31   (  -0.01,-104.67) (   0.44,-102.77)  217.93                80
 09/23/2023   08:37:18   (   0.01,-104.69) (   0.76,-108.03)  380.49                80
 09/24/2023   08:15:53   (   0.01,-104.69) (  -0.27,-103.51)  135.11                80
 09/25/2023   20:37:50   (  -0.02,-104.65) (  -0.92,-108.81)  473.54                80
 09/26/2023   20:21:44   (  -0.02,-104.65) (   0.05,-104.27)   42.53                80
 09/29/2023   08:24:47   (   0.02,-104.67) (   0.11,-105.01)   39.15                80