Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 3 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)
 03/29/2023   20:16:44   (  -0.00,-104.75) (   0.43,-102.83)  219.41                80
 03/31/2023   08:38:29   (   0.00,-104.75) (   0.78,-108.09)  380.87                80
 04/01/2023   08:17:04   (   0.00,-104.75) (  -0.27,-103.56)  135.93                80
 04/02/2023   20:38:58   (  -0.00,-104.76) (  -0.91,-108.86)  467.40                80
 04/03/2023   20:22:52   (  -0.00,-104.76) (   0.08,-104.32)   49.90                80
 04/06/2023   08:25:52   (   0.00,-104.77) (   0.06,-105.05)   32.43                80
 04/07/2023   08:04:25   (  -0.00,-104.77) (  -0.94,-100.51)  484.56                80
 04/08/2023   20:26:19   (   0.00,-104.77) (  -0.22,-105.82)  118.99                80
 04/09/2023   20:10:13   (   0.01,-104.77) (   0.79,-101.28)  397.94                80
 04/11/2023   08:31:58   (  -0.01,-104.77) (   0.39,-106.54)  202.11                80