Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/11/2018   08:26:51   (   0.36,-104.18) (   0.55,-104.91)   84.56                80
 09/12/2018   08:05:27   (   0.36,-104.16) (  -0.50,-100.39)  429.94                80
 09/13/2018   20:27:24   (  -0.35,-104.25) (  -0.67,-105.70)  164.25                80
 09/14/2018   20:11:20   (  -0.36,-104.25) (   0.33,-101.16)  351.75                80
 09/16/2018   08:33:08   (   0.34,-104.14) (   0.88,-106.43)  261.36                80
 09/17/2018   08:11:45   (   0.35,-104.12) (  -0.18,-101.91)  253.07                80
 09/18/2018   20:33:42   (  -0.33,-104.19) (  -0.99,-107.22)  344.02                80
 09/19/2018   20:17:38   (  -0.33,-104.19) (   0.01,-102.68)  172.00                80
 09/21/2018   08:39:26   (   0.32,-104.10) (   1.20,-107.95)  438.29                80
 09/22/2018   08:18:01   (   0.32,-104.09) (   0.20,-103.41)   76.32                80