Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/25/2018   22:40:09   (   0.04,-134.95) (  -0.87,-139.01)  462.60                80
 01/26/2018   22:24:03   (   0.04,-134.99) (   0.13,-134.47)   58.10                80
 01/29/2018   10:27:05   (  -0.03,-135.11) (   0.01,-135.21)   12.43                80
 01/31/2018   22:30:15   (   0.03,-135.14) (  -0.19,-135.98)   95.71                80
 02/01/2018   22:08:50   (   0.02,-135.17) (   0.88,-131.45)  424.20                80
 02/03/2018   10:33:17   (  -0.02,-135.25) (   0.33,-136.71)  166.94                80
 02/04/2018   10:11:52   (  -0.02,-135.28) (  -0.74,-132.19)  352.67                80
 02/05/2018   22:36:26   (   0.02,-135.28) (  -0.49,-137.48)  251.25                80
 02/06/2018   22:15:02   (   0.02,-135.30) (   0.58,-132.96)  268.18                80
 02/08/2018   10:39:28   (  -0.01,-135.38) (   0.63,-138.22)  323.61                80