Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 8 9.  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)
 08/09/2023   20:21:40   (   0.01,-104.70) (   0.11,-104.21)   55.92                80
 08/12/2023   08:24:40   (  -0.02,-104.72) (   0.05,-104.94)   25.86                80
 08/13/2023   08:03:15   (  -0.02,-104.71) (  -1.00,-100.41)  490.73                80
 08/14/2023   20:25:09   (   0.03,-104.69) (  -0.17,-105.71)  115.31                80
 08/15/2023   20:09:02   (   0.03,-104.69) (   0.82,-101.17)  401.80                80
 08/17/2023   08:30:48   (  -0.03,-104.72) (   0.37,-106.43)  195.67                80
 08/18/2023   08:09:22   (  -0.03,-104.72) (  -0.68,-101.90)  321.38                80
 08/19/2023   20:31:16   (   0.03,-104.70) (  -0.53,-107.19)  284.51                80
 08/20/2023   20:15:09   (   0.03,-104.70) (   0.47,-102.65)  232.90                80
 08/22/2023   08:36:55   (  -0.04,-104.73) (   0.66,-107.92)  363.94                80