Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 3 30.  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)
 03/31/2023   08:38:29   (   0.02,-104.75) (   0.79,-108.08)  380.62                80
 04/01/2023   08:17:04   (   0.02,-104.75) (  -0.25,-103.56)  136.24                80
 04/02/2023   20:38:58   (  -0.02,-104.75) (  -0.92,-108.86)  467.14                80
 04/03/2023   20:22:52   (  -0.02,-104.76) (   0.07,-104.32)   50.02                80
 04/06/2023   08:25:51   (   0.00,-104.76) (   0.07,-105.05)   32.67                80
 04/07/2023   08:04:25   (  -0.01,-104.76) (  -0.93,-100.51)  484.05                80
 04/08/2023   20:26:19   (   0.03,-104.77) (  -0.22,-105.81)  119.92                80
 04/09/2023   20:10:13   (   0.02,-104.77) (   0.78,-101.28)  397.13                80
 04/11/2023   08:31:58   (  -0.02,-104.76) (   0.39,-106.54)  202.84                80
 04/12/2023   08:10:32   (  -0.02,-104.76) (  -0.62,-102.00)  313.75                80