Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2019   21:46:30   (   0.06,-128.11) (   0.74,-125.17)  335.52                80
 01/17/2019   10:05:38   (  -0.06,-128.17) (   0.45,-130.44)  259.23                80
 01/18/2019   09:49:32   (  -0.05,-128.13) (  -0.53,-125.90)  253.64                80
 01/19/2019   22:08:47   (   0.06,-127.97) (  -0.68,-131.20)  368.27                80
 01/20/2019   21:52:42   (   0.05,-127.93) (   0.31,-126.66)  144.16                80
 01/22/2019   10:11:50   (  -0.06,-127.97) (   0.82,-131.94)  451.90                80
 01/23/2019   09:55:45   (  -0.05,-127.93) (  -0.16,-127.40)   60.27                80
 01/25/2019   21:56:15   (   0.06,-127.72) (  -0.05,-128.16)   50.21                80
 01/26/2019   21:40:10   (   0.05,-127.68) (   0.99,-123.64)  461.83                80
 01/28/2019   09:59:17   (  -0.06,-127.72) (   0.20,-128.90)  134.66                80