Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2020   22:46:25   (  -0.03,-137.19) (  -0.76,-140.56)  383.11                80
 07/31/2020   22:30:20   (  -0.03,-137.19) (   0.23,-136.02)  132.54                80
 08/02/2020   10:49:28   (  -0.00,-137.18) (   0.95,-141.29)  469.43                80
 08/03/2020   10:33:25   (  -0.01,-137.17) (  -0.10,-136.77)   45.92                80
 08/05/2020   22:33:58   (   0.00,-137.15) (  -0.09,-137.54)   44.99                80
 08/06/2020   22:17:53   (  -0.00,-137.14) (   0.90,-133.01)  470.46                80
 08/08/2020   10:37:02   (   0.00,-137.13) (   0.28,-138.28)  131.33                80
 08/09/2020   10:20:58   (   0.01,-137.12) (  -0.77,-133.76)  383.76                80
 08/10/2020   22:40:14   (  -0.00,-137.09) (  -0.47,-139.05)  223.74                80
 08/11/2020   22:24:11   (  -0.00,-137.08) (   0.59,-134.53)  290.86                80
 08/13/2020   10:43:19   (  -0.01,-137.06) (   0.60,-139.80)  312.41                80