Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 5.  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)
 09/05/2023   20:15:27   (   0.01,-104.69) (   0.43,-102.73)  222.87                80
 09/07/2023   08:37:15   (  -0.01,-104.71) (   0.75,-108.01)  376.29                80
 09/08/2023   08:15:52   (  -0.02,-104.71) (  -0.31,-103.49)  139.55                80
 09/09/2023   20:37:48   (   0.02,-104.69) (  -0.91,-108.79)  467.93                80
 09/10/2023   20:21:44   (   0.02,-104.69) (   0.10,-104.26)   48.37                80
 09/13/2023   08:24:48   (  -0.03,-104.71) (   0.06,-105.00)   33.62                80
 09/14/2023   08:03:23   (  -0.02,-104.72) (  -0.95,-100.47)  482.77                80
 09/15/2023   20:25:20   (   0.02,-104.70) (  -0.20,-105.79)  124.10                80
 09/16/2023   20:09:16   (   0.02,-104.70) (   0.81,-101.26)  392.62                80
 09/18/2023   08:31:03   (  -0.03,-104.73) (   0.40,-106.52)  205.03                80