Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 3 19.  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)
 03/21/2023   08:26:12   (   0.02,-104.74) (   0.07,-105.10)   40.38                80
 03/22/2023   08:04:47   (   0.02,-104.74) (  -0.95,-100.57)  476.32                80
 03/23/2023   20:26:41   (  -0.02,-104.76) (  -0.27,-105.86)  125.96                80
 03/24/2023   20:10:35   (  -0.02,-104.76) (   0.76,-101.33)  391.10                80
 03/26/2023   08:32:22   (   0.01,-104.75) (   0.41,-106.60)  210.53                80
 03/27/2023   08:10:56   (   0.01,-104.75) (  -0.62,-102.07)  306.05                80
 03/28/2023   20:32:50   (  -0.00,-104.76) (  -0.58,-107.37)  296.90                80
 03/29/2023   20:16:45   (  -0.01,-104.76) (   0.45,-102.84)  220.11                80
 03/31/2023   08:38:30   (   0.01,-104.76) (   0.77,-108.09)  380.77                80
 04/01/2023   08:17:05   (   0.01,-104.76) (  -0.27,-103.56)  136.16                80