Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 24.  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)
 04/24/2023   20:25:50   (  -0.00,-104.74) (  -0.22,-105.72)  112.05                80
 04/25/2023   20:09:43   (   0.00,-104.74) (   0.82,-101.19)  405.30                80
 04/27/2023   08:31:26   (  -0.00,-104.74) (   0.40,-106.43)  193.98                80
 04/28/2023   08:10:00   (  -0.00,-104.74) (  -0.65,-101.90)  323.33                80
 04/29/2023   20:31:52   (   0.00,-104.74) (  -0.55,-107.19)  279.52                80
 04/30/2023   20:15:45   (   0.00,-104.74) (   0.46,-102.65)  238.29                80
 05/02/2023   08:37:29   (  -0.00,-104.75) (   0.68,-107.91)  359.83                80
 05/03/2023   08:16:02   (  -0.01,-104.75) (  -0.33,-103.37)  157.77                80
 05/04/2023   20:37:53   (   0.01,-104.75) (  -0.89,-108.65)  445.37                80
 05/05/2023   20:21:45   (   0.02,-104.75) (   0.14,-104.11)   72.32                80