Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2018   20:27:24   (  -0.35,-104.25) (  -0.67,-105.70)  164.42                80
 09/14/2018   20:11:20   (  -0.36,-104.25) (   0.32,-101.16)  351.48                80
 09/16/2018   08:33:08   (   0.34,-104.13) (   0.88,-106.43)  261.73                80
 09/17/2018   08:11:45   (   0.35,-104.12) (  -0.18,-101.91)  252.61                80
 09/18/2018   20:33:42   (  -0.33,-104.19) (  -0.98,-107.21)  344.65                80
 09/19/2018   20:17:38   (  -0.33,-104.18) (   0.01,-102.68)  171.30                80
 09/21/2018   08:39:26   (   0.32,-104.10) (   1.19,-107.95)  439.08                80
 09/22/2018   08:18:01   (   0.32,-104.08) (   0.19,-103.41)   75.40                80
 09/24/2018   20:21:14   (  -0.31,-104.12) (  -0.35,-104.19)    8.40                80
 09/27/2018   08:26:59   (   0.30,-104.05) (   0.49,-104.93)  100.89                80