Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/01/2020   22:08:25   (   0.01,-128.33) (  -0.58,-131.09)  313.45                80
 08/02/2020   21:52:20   (   0.01,-128.32) (   0.42,-126.55)  201.88                80
 08/04/2020   10:14:09   (  -0.01,-128.36) (   0.76,-131.82)  394.11                80
 08/05/2020   09:52:44   (  -0.01,-128.35) (  -0.23,-127.29)  121.01                80
 08/06/2020   22:14:42   (   0.01,-128.28) (  -0.96,-132.59)  491.86                80
 08/07/2020   21:58:37   (   0.01,-128.27) (   0.04,-128.06)   23.32                80
 08/10/2020   10:01:42   (  -0.00,-128.29) (   0.09,-128.81)   58.18                80
 08/11/2020   09:40:18   (  -0.00,-128.28) (  -0.91,-124.27)  456.43                80
 08/12/2020   22:02:14   (   0.01,-128.19) (  -0.33,-129.57)  157.66                80
 08/13/2020   21:46:10   (   0.00,-128.17) (   0.73,-125.05)  356.64                80