Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/21/2020   10:39:17   (   0.01,-137.20) (   0.26,-138.23)  117.82                80
 06/22/2020   10:17:53   (   0.00,-137.20) (  -0.78,-133.70)  398.23                80
 06/23/2020   22:42:28   (  -0.00,-137.18) (  -0.43,-139.00)  207.05                80
 06/24/2020   22:21:04   (   0.00,-137.18) (   0.61,-134.47)  308.71                80
 06/26/2020   10:45:31   (   0.01,-137.16) (   0.56,-139.73)  292.63                80
 06/27/2020   10:24:05   (   0.01,-137.15) (  -0.42,-135.19)  222.90                80
 06/28/2020   22:48:41   (  -0.01,-137.13) (  -0.79,-140.49)  383.26                80
 06/29/2020   22:27:16   (  -0.00,-137.12) (   0.25,-135.96)  131.83                80
 07/01/2020   10:51:43   (  -0.00,-137.10) (   0.92,-141.23)  470.83                80
 07/02/2020   10:30:19   (  -0.01,-137.08) (  -0.12,-136.70)   43.84                80