Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/31/2018   22:27:36   (   0.03,-135.14) (  -0.14,-135.98)   95.53                80
 02/01/2018   22:11:19   (   0.03,-135.17) (   0.87,-131.45)  424.37                69
 02/03/2018   10:33:17   (  -0.03,-135.25) (   0.28,-136.72)  167.38                80
 02/04/2018   10:11:52   (  -0.03,-135.28) (  -0.73,-132.19)  352.23                80
 02/05/2018   22:36:27   (   0.02,-135.28) (  -0.45,-137.49)  251.07                80
 02/06/2018   22:15:02   (   0.02,-135.31) (   0.55,-132.95)  268.39                80
 02/08/2018   10:39:28   (  -0.02,-135.38) (   0.65,-138.21)  323.93                80
 02/09/2018   10:18:04   (  -0.01,-135.40) (  -0.42,-133.69)  195.24                80
 02/10/2018   22:42:38   (  -0.00,-135.39) (  -0.82,-138.98)  408.86                80
 02/11/2018   22:21:12   (  -0.01,-135.41) (   0.19,-134.44)  109.93                80
 02/13/2018   10:45:40   (   0.01,-135.47) (   0.95,-139.72)  483.56                80