Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 27.  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)
 04/27/2023   08:31:29   (   0.00,-104.73) (   0.41,-106.44)  195.41                80
 04/28/2023   08:10:05   (   0.00,-104.73) (  -0.62,-101.92)  320.26                80
 04/29/2023   20:32:03   (  -0.00,-104.73) (  -0.58,-107.23)  285.07                80
 04/30/2023   20:15:59   (  -0.00,-104.73) (   0.46,-102.71)  231.05                80
 05/02/2023   08:37:47   (   0.00,-104.74) (   0.75,-107.98)  369.87                80
 05/03/2023   08:16:24   (  -0.00,-104.74) (  -0.29,-103.46)  146.04                80
 05/04/2023   20:38:21   (   0.00,-104.73) (  -0.90,-108.77)  459.58                80
 05/05/2023   20:22:17   (   0.00,-104.73) (   0.09,-104.23)   56.46                80
 05/08/2023   08:25:22   (  -0.01,-104.73) (   0.07,-104.98)   29.51                80
 05/09/2023   08:03:58   (  -0.02,-104.73) (  -0.98,-100.47)  485.77                80
 05/10/2023   20:25:54   (   0.02,-104.71) (  -0.25,-105.77)  120.89                80