Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 12 12.  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) (  -0.09,-104.37)   39.78                80
 12/14/2018   20:05:11   (  -0.01,-104.03) (   0.94, -99.84)  477.46                80
 12/16/2018   08:27:00   (  -0.00,-104.23) (   0.18,-105.13)  101.43                80
 12/17/2018   08:05:34   (   0.01,-104.23) (  -0.79,-100.59)  414.76                80
 12/18/2018   20:27:30   (   0.01,-104.02) (  -0.39,-105.89)  212.76                80
 12/19/2018   20:11:25   (   0.00,-104.03) (   0.58,-101.35)  304.37                80
 12/21/2018   08:33:13   (  -0.01,-104.24) (   0.55,-106.63)  272.96                80
 12/22/2018   08:11:49   (  -0.00,-104.24) (  -0.49,-102.11)  242.96                80
 12/23/2018   20:33:44   (   0.02,-104.01) (  -0.74,-107.40)  386.84                80
 12/24/2018   20:17:39   (   0.01,-104.01) (   0.23,-102.86)  129.84                80
 12/26/2018   08:39:28   (  -0.02,-104.24) (   0.84,-108.16)  446.33                80