Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 11.  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   09:59:24   (  -0.06,-128.31) (   0.10,-128.93)   71.12                80
 01/13/2019   09:43:20   (  -0.05,-128.29) (  -0.94,-124.41)  442.51                80
 01/14/2019   22:02:35   (   0.06,-128.14) (  -0.27,-129.70)  178.15                80
 01/15/2019   21:46:30   (   0.05,-128.11) (   0.71,-125.17)  335.15                80
 01/17/2019   10:05:38   (  -0.06,-128.16) (   0.42,-130.45)  259.81                80
 01/18/2019   09:49:33   (  -0.05,-128.12) (  -0.56,-125.91)  252.98                80
 01/19/2019   22:08:48   (   0.06,-127.96) (  -0.64,-131.21)  369.08                80
 01/20/2019   21:52:42   (   0.05,-127.92) (   0.34,-126.67)  143.22                80
 01/22/2019   10:11:50   (  -0.05,-127.96) (   0.85,-131.93)  453.08                80
 01/23/2019   09:55:45   (  -0.05,-127.92) (  -0.19,-127.41)   59.06                80