Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 10 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)
 10/05/2023   08:09:35   (   0.02,-104.71) (  -0.62,-101.99)  311.13                80
 10/06/2023   20:31:31   (  -0.02,-104.69) (  -0.60,-107.28)  295.42                80
 10/07/2023   20:15:25   (  -0.02,-104.69) (   0.40,-102.75)  221.18                80
 10/09/2023   08:37:13   (   0.01,-104.71) (   0.74,-108.02)  377.04                80
 10/10/2023   08:15:47   (   0.00,-104.71) (  -0.26,-103.49)  139.46                80
 10/11/2023   20:37:42   (   0.00,-104.69) (  -0.94,-108.79)  466.95                80
 10/12/2023   20:21:37   (  -0.00,-104.70) (   0.07,-104.25)   50.23                80
 10/15/2023   08:24:39   (   0.01,-104.73) (   0.04,-104.99)   30.02                80
 10/16/2023   08:03:12   (   0.01,-104.73) (  -0.91,-100.45)  486.93                80
 10/17/2023   20:25:08   (  -0.02,-104.70) (  -0.26,-105.75)  119.60                80