Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 30.  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)
 09/30/2023   08:03:22   (   0.00,-104.71) (  -0.94,-100.48)  482.08                80
 10/01/2023   20:25:19   (  -0.00,-104.70) (  -0.24,-105.79)  124.13                80
 10/02/2023   20:09:13   (  -0.00,-104.70) (   0.75,-101.25)  392.70                80
 10/04/2023   08:31:00   (   0.00,-104.72) (   0.41,-106.52)  204.89                80
 10/05/2023   08:09:36   (   0.00,-104.72) (  -0.63,-101.99)  311.62                80
 10/06/2023   20:31:31   (   0.00,-104.70) (  -0.59,-107.29)  295.17                80
 10/07/2023   20:15:27   (   0.00,-104.71) (   0.46,-102.77)  221.78                80
 10/09/2023   08:37:13   (  -0.00,-104.74) (   0.74,-108.03)  375.04                80
 10/10/2023   08:15:48   (  -0.00,-104.74) (  -0.25,-103.49)  141.87                80
 10/11/2023   20:37:44   (   0.00,-104.72) (  -0.89,-108.80)  464.72                80
 10/12/2023   20:21:38   (   0.00,-104.73) (   0.11,-104.27)   52.60                80