Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 1.  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)
 09/02/2023   08:30:58   (  -0.00,-104.71) (   0.42,-106.48)  202.30                80
 09/03/2023   08:09:35   (  -0.00,-104.71) (  -0.64,-101.96)  313.92                80
 09/04/2023   20:31:31   (  -0.00,-104.69) (  -0.59,-107.26)  293.28                80
 09/05/2023   20:15:27   (  -0.00,-104.69) (   0.41,-102.73)  223.21                80
 09/07/2023   08:37:15   (   0.01,-104.72) (   0.77,-108.00)  374.64                80
 09/08/2023   08:15:52   (   0.01,-104.72) (  -0.29,-103.49)  141.58                80
 09/09/2023   20:37:48   (  -0.02,-104.70) (  -0.93,-108.79)  466.05                80
 09/10/2023   20:21:43   (  -0.02,-104.70) (   0.08,-104.26)   50.51                80
 09/13/2023   08:24:47   (   0.02,-104.74) (   0.09,-105.00)   29.99                80
 09/14/2023   08:03:23   (   0.02,-104.74) (  -0.92,-100.47)  486.52                80