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)
 10/04/2023   08:31:00   (   0.01,-104.72) (   0.42,-106.52)  205.21                80
 10/05/2023   08:09:36   (   0.00,-104.71) (  -0.63,-101.99)  311.01                80
 10/06/2023   20:31:31   (  -0.00,-104.70) (  -0.58,-107.29)  295.48                80
 10/07/2023   20:15:26   (   0.00,-104.70) (   0.41,-102.75)  221.22                80
 10/09/2023   08:37:13   (  -0.00,-104.72) (   0.73,-108.03)  376.37                80
 10/10/2023   08:15:47   (  -0.01,-104.72) (  -0.27,-103.49)  140.21                80
 10/11/2023   20:37:44   (   0.02,-104.70) (  -0.87,-108.80)  466.42                80
 10/12/2023   20:21:37   (  -0.00,-104.71) (   0.07,-104.25)   51.54                80
 10/15/2023   08:24:38   (   0.03,-104.74) (   0.10,-104.98)   27.77                80
 10/16/2023   08:03:13   (   0.03,-104.75) (  -0.91,-100.45)  489.25                80
 10/17/2023   20:25:08   (  -0.03,-104.72) (  -0.27,-105.75)  117.33                80