Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 12 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)
 12/13/2018   20:21:16   (  -0.01,-104.02) (  -0.10,-104.37)   39.85                80
 12/14/2018   20:05:11   (  -0.01,-104.03) (   0.93, -99.84)  477.43                80
 12/16/2018   08:26:59   (  -0.00,-104.23) (   0.20,-105.12)  101.42                80
 12/17/2018   08:05:35   (   0.01,-104.23) (  -0.83,-100.60)  414.77                80
 12/18/2018   20:27:30   (   0.01,-104.02) (  -0.41,-105.89)  212.76                80
 12/19/2018   20:11:25   (   0.00,-104.03) (   0.57,-101.35)  304.38                80
 12/21/2018   08:33:14   (  -0.01,-104.24) (   0.50,-106.64)  272.95                80
 12/22/2018   08:11:49   (  -0.00,-104.24) (  -0.47,-102.10)  242.98                80
 12/23/2018   20:33:44   (   0.02,-104.01) (  -0.75,-107.40)  386.82                80
 12/24/2018   20:17:39   (   0.01,-104.01) (   0.28,-102.87)  129.84                80