Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 29.  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)
 04/29/2023   20:32:03   (  -0.00,-104.73) (  -0.57,-107.23)  284.97                80
 04/30/2023   20:15:59   (  -0.00,-104.73) (   0.47,-102.71)  231.17                80
 05/02/2023   08:37:47   (   0.00,-104.74) (   0.74,-107.98)  369.77                80
 05/03/2023   08:16:24   (  -0.00,-104.74) (  -0.30,-103.46)  146.10                80
 05/04/2023   20:38:21   (   0.01,-104.73) (  -0.88,-108.77)  459.52                80
 05/05/2023   20:22:17   (   0.01,-104.73) (   0.12,-104.24)   56.35                80
 05/08/2023   08:25:22   (  -0.02,-104.73) (   0.02,-104.99)   29.37                80
 05/09/2023   08:03:57   (  -0.02,-104.72) (  -0.98,-100.46)  486.17                80
 05/10/2023   20:25:53   (   0.01,-104.71) (  -0.24,-105.76)  120.33                80
 05/11/2023   20:09:49   (   0.01,-104.71) (   0.77,-101.23)  395.50                80