Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 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)
 01/31/2019   21:46:22   (   0.05,-127.66) (   0.59,-125.13)  288.28                80
 02/02/2019   10:08:10   (  -0.05,-127.79) (   0.54,-130.41)  298.08                80
 02/03/2019   09:46:46   (  -0.04,-127.83) (  -0.51,-125.88)  222.45                80
 02/04/2019   22:08:41   (   0.05,-127.81) (  -0.69,-131.18)  383.94                80
 02/05/2019   21:52:36   (   0.05,-127.84) (   0.30,-126.64)  136.47                80
 02/07/2019   10:14:24   (  -0.05,-127.97) (   0.82,-131.92)  450.27                80
 02/08/2019   09:52:58   (  -0.05,-128.00) (  -0.16,-127.38)   69.87                80
 02/10/2019   21:56:09   (   0.04,-128.01) (   0.01,-128.16)   17.33                80
 02/13/2019   10:01:52   (  -0.04,-128.15) (   0.12,-128.90)   85.46                80