Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/30/2020   22:10:44   (  -0.03,-128.09) (  -0.69,-131.02)  333.31                80
 07/01/2020   21:49:45   (  -0.03,-128.12) (   0.35,-126.49)  185.47                56
 07/03/2020   10:13:49   (   0.03,-128.21) (   0.85,-131.76)  405.29                80
 07/04/2020   09:52:26   (   0.02,-128.23) (  -0.19,-127.24)  112.83                80
 07/05/2020   22:14:23   (  -0.02,-128.20) (  -0.99,-132.54)  494.86                80
 07/06/2020   21:55:40   (  -0.02,-128.22) (   0.05,-128.02)   23.60                80
 07/09/2020   10:01:24   (   0.02,-128.33) (   0.11,-128.77)   49.10                80
 07/10/2020   09:40:00   (   0.02,-128.35) (  -0.88,-124.23)  468.97                80
 07/11/2020   22:01:57   (  -0.02,-128.32) (  -0.31,-129.54)  139.14                80
 07/12/2020   21:45:54   (  -0.02,-128.34) (   0.74,-125.01)  378.99                80
 07/14/2020   10:07:42   (   0.02,-128.42) (   0.46,-130.28)  212.30                80