Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2024 6 18.  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)
 06/18/2024   20:33:06   (   0.00,-104.71) (  -0.58,-107.36)  301.86                80
 06/19/2024   20:17:02   (  -0.00,-104.71) (   0.42,-102.83)  214.29                80
 06/21/2024   08:38:52   (   0.01,-104.71) (   0.76,-108.10)  386.70                80
 06/22/2024   08:17:28   (   0.01,-104.70) (  -0.25,-103.57)  129.11                80
 06/23/2024   20:39:26   (  -0.01,-104.70) (  -0.94,-108.88)  476.30                80
 06/24/2024   20:23:23   (  -0.02,-104.70) (   0.07,-104.35)   39.59                80
 06/27/2024   08:26:29   (   0.02,-104.69) (   0.09,-105.10)   45.46                80
 06/28/2024   08:05:05   (   0.02,-104.69) (  -0.93,-100.57)  470.56                80
 06/29/2024   20:27:03   (  -0.02,-104.69) (  -0.31,-105.86)  134.58                80
 06/30/2024   20:10:59   (  -0.02,-104.69) (   0.71,-101.34)  381.61                80