Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2018   08:33:14   (  -0.01,-104.26) (   0.51,-106.64)  271.59                80
 12/22/2018   08:11:48   (  -0.00,-104.25) (  -0.47,-102.10)  244.59                80
 12/23/2018   20:33:45   (   0.01,-104.03) (  -0.71,-107.41)  384.39                80
 12/24/2018   20:17:39   (   0.01,-104.03) (   0.26,-102.87)  132.62                80
 12/26/2018   08:39:28   (  -0.02,-104.26) (   0.87,-108.15)  443.21                80
 12/27/2018   08:18:03   (  -0.01,-104.26) (  -0.17,-103.62)   72.99                80
 12/29/2018   20:21:13   (   0.02,-104.03) (  -0.09,-104.38)   40.09                80
 12/30/2018   20:05:08   (   0.01,-104.04) (   0.95, -99.85)  477.37                80
 01/01/2019   08:26:57   (  -0.03,-104.28) (   0.18,-105.13)   97.18                80
 01/02/2019   08:05:32   (  -0.01,-104.28) (  -0.85,-100.61)  419.41                80