Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 3 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/06/2020   21:45:55   (   0.34,-128.43) (   1.10,-125.15)  374.19                80
 03/08/2020   10:07:43   (  -0.34,-128.39) (   0.12,-130.41)  230.09                80
 03/09/2020   09:46:18   (  -0.34,-128.38) (  -0.88,-125.88)  284.85                80
 03/10/2020   22:08:16   (   0.33,-128.38) (  -0.27,-131.19)  319.83                80
 03/11/2020   21:52:11   (   0.34,-128.37) (   0.74,-126.66)  195.16                80
 03/13/2020   10:13:58   (  -0.33,-128.33) (   0.48,-131.92)  409.27                80
 03/14/2020   09:52:34   (  -0.33,-128.31) (  -0.52,-127.39)  105.10                80
 03/16/2020   21:58:26   (   0.32,-128.28) (   0.33,-128.16)   13.81                80
 03/19/2020   10:01:30   (  -0.31,-128.22) (  -0.17,-128.90)   77.26                80