Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/10/2020   09:40:00   (   0.02,-128.32) (  -0.87,-124.23)  466.60                80
 07/11/2020   22:01:57   (  -0.03,-128.30) (  -0.32,-129.53)  141.18                80
 07/12/2020   21:45:53   (  -0.03,-128.31) (   0.73,-125.01)  376.55                80
 07/14/2020   10:07:42   (   0.03,-128.38) (   0.47,-130.28)  216.34                80
 07/15/2020   09:46:18   (   0.02,-128.39) (  -0.58,-125.75)  300.68                80
 07/16/2020   22:08:16   (  -0.02,-128.35) (  -0.61,-131.06)  308.83                80
 07/17/2020   21:52:11   (  -0.01,-128.35) (   0.38,-126.53)  207.94                80
 07/19/2020   10:14:00   (   0.00,-128.42) (   0.75,-131.81)  386.14                80
 07/20/2020   09:52:36   (  -0.01,-128.42) (  -0.24,-127.27)  129.95                80
 07/21/2020   22:14:33   (   0.01,-128.36) (  -0.94,-132.58)  481.29                80
 07/22/2020   21:58:30   (   0.02,-128.36) (   0.11,-128.06)   34.94                80