Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 4.  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)
 09/04/2023   20:31:32   (  -0.00,-104.69) (  -0.55,-107.27)  293.32                80
 09/05/2023   20:15:27   (   0.00,-104.69) (   0.45,-102.74)  222.95                80
 09/07/2023   08:37:16   (  -0.00,-104.71) (   0.73,-108.01)  375.78                80
 09/08/2023   08:15:51   (  -0.01,-104.71) (  -0.28,-103.48)  140.12                80
 09/09/2023   20:37:49   (   0.01,-104.69) (  -0.88,-108.80)  467.42                80
 09/10/2023   20:21:44   (   0.01,-104.69) (   0.13,-104.27)   49.01                80
 09/13/2023   08:24:48   (  -0.01,-104.72) (   0.03,-105.01)   32.51                80
 09/14/2023   08:03:23   (  -0.01,-104.72) (  -0.98,-100.48)  484.04                80
 09/15/2023   20:25:20   (   0.00,-104.70) (  -0.22,-105.78)  122.91                80
 09/16/2023   20:09:15   (   0.00,-104.71) (   0.79,-101.26)  393.89                80