Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 12 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)
 12/10/2018   08:39:29   (   0.00,-104.22) (   0.90,-108.13)  446.22                80
 12/11/2018   08:18:05   (   0.02,-104.22) (  -0.12,-103.60)   69.79                80
 12/13/2018   20:21:16   (  -0.01,-104.02) (  -0.09,-104.37)   39.79                80
 12/14/2018   20:05:11   (  -0.01,-104.03) (   0.94, -99.84)  477.47                80
 12/16/2018   08:27:00   (  -0.00,-104.23) (   0.19,-105.12)  101.37                80
 12/17/2018   08:05:34   (   0.01,-104.23) (  -0.78,-100.58)  414.84                80
 12/18/2018   20:27:30   (   0.01,-104.02) (  -0.40,-105.89)  212.65                80
 12/19/2018   20:11:25   (   0.00,-104.03) (   0.57,-101.35)  304.49                80
 12/21/2018   08:33:14   (  -0.01,-104.25) (   0.50,-106.65)  272.84                80
 12/22/2018   08:11:49   (  -0.00,-104.24) (  -0.47,-102.11)  243.10                80
 12/23/2018   20:33:44   (   0.02,-104.01) (  -0.76,-107.40)  386.66                80