Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 29.  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   22:30:16   (   0.03,-135.14) (  -0.14,-135.98)   95.56                80
 02/01/2018   22:08:50   (   0.03,-135.17) (   0.86,-131.45)  424.35                80
 02/03/2018   10:33:17   (  -0.02,-135.25) (   0.29,-136.72)  167.16                80
 02/04/2018   10:11:52   (  -0.03,-135.28) (  -0.72,-132.19)  352.46                80
 02/05/2018   22:36:27   (   0.02,-135.28) (  -0.46,-137.49)  251.02                80
 02/06/2018   22:15:02   (   0.02,-135.31) (   0.55,-132.95)  268.44                80
 02/08/2018   10:39:29   (  -0.02,-135.38) (   0.60,-138.22)  323.66                80
 02/09/2018   10:18:04   (  -0.01,-135.40) (  -0.41,-133.69)  195.51                80
 02/10/2018   22:42:38   (  -0.01,-135.40) (  -0.83,-138.98)  408.75                80
 02/11/2018   22:21:12   (  -0.01,-135.41) (   0.18,-134.44)  110.06                80