Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 11.  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,-104.17) (   0.50,-104.92)   84.60                80
 09/12/2018   08:05:27   (   0.36,-104.16) (  -0.49,-100.39)  429.85                80
 09/13/2018   20:27:24   (  -0.35,-104.25) (  -0.67,-105.69)  164.33                80
 09/14/2018   20:11:20   (  -0.36,-104.25) (   0.32,-101.16)  351.65                80
 09/16/2018   08:33:08   (   0.34,-104.14) (   0.88,-106.43)  261.50                80
 09/17/2018   08:11:45   (   0.35,-104.12) (  -0.17,-101.90)  252.91                80
 09/18/2018   20:33:42   (  -0.33,-104.19) (  -0.99,-107.21)  344.19                80
 09/19/2018   20:17:37   (  -0.33,-104.19) (   0.00,-102.68)  171.82                80
 09/21/2018   08:39:26   (   0.32,-104.10) (   1.20,-107.94)  438.50                80
 09/22/2018   08:18:02   (   0.32,-104.08) (   0.15,-103.42)   76.10                80
 09/24/2018   20:21:15   (  -0.31,-104.13) (  -0.30,-104.20)    7.78                80