Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/12/2019   09:59:25   (  -0.06,-128.31) (   0.07,-128.94)   71.16                80
 01/13/2019   09:43:19   (  -0.05,-128.29) (  -0.91,-124.40)  442.43                80
 01/14/2019   22:02:35   (   0.06,-128.14) (  -0.30,-129.70)  178.24                80
 01/15/2019   21:46:29   (   0.05,-128.11) (   0.68,-125.16)  335.03                80
 01/17/2019   10:05:38   (  -0.06,-128.16) (   0.45,-130.44)  260.01                80
 01/18/2019   09:49:32   (  -0.05,-128.12) (  -0.53,-125.90)  252.74                80
 01/19/2019   22:08:47   (   0.05,-127.96) (  -0.67,-131.20)  369.30                80
 01/20/2019   21:52:42   (   0.05,-127.92) (   0.31,-126.66)  142.96                80
 01/22/2019   10:11:50   (  -0.05,-127.96) (   0.82,-131.94)  453.47                80
 01/23/2019   09:55:45   (  -0.05,-127.92) (  -0.16,-127.40)   58.57                80