Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 20.  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)
 05/20/2023   20:38:28   (  -0.00,-104.72) (  -0.89,-108.82)  466.29                80
 05/21/2023   20:22:24   (   0.00,-104.72) (   0.11,-104.29)   49.83                80
 05/24/2023   08:25:28   (  -0.01,-104.72) (   0.03,-105.04)   35.13                80
 05/25/2023   08:04:03   (  -0.02,-104.72) (  -0.98,-100.51)  480.87                80
 05/26/2023   20:25:59   (   0.01,-104.72) (  -0.23,-105.81)  124.26                80
 05/27/2023   20:09:55   (   0.00,-104.72) (   0.78,-101.28)  392.45                80
 05/29/2023   08:31:42   (   0.00,-104.73) (   0.43,-106.55)  207.26                80
 05/30/2023   08:10:18   (   0.00,-104.73) (  -0.59,-102.02)  309.09                80
 05/31/2023   20:32:15   (   0.01,-104.73) (  -0.55,-107.34)  296.67                80
 06/01/2023   20:16:11   (   0.01,-104.73) (   0.47,-102.81)  219.71                80