Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/01/2018   10:45:26   (   0.02,-135.38) (   0.96,-139.66)  487.43                80
 03/02/2018   10:24:01   (   0.02,-135.37) (  -0.05,-135.12)   28.05                80
 03/04/2018   22:29:49   (  -0.02,-135.32) (  -0.18,-135.88)   63.97                80
 03/05/2018   22:08:25   (  -0.02,-135.31) (   0.90,-131.36)  451.33                80
 03/07/2018   10:32:50   (   0.02,-135.30) (   0.33,-136.61)  149.73                80
 03/08/2018   10:11:25   (   0.02,-135.28) (  -0.68,-132.07)  365.08                80
 03/09/2018   22:36:00   (  -0.03,-135.24) (  -0.50,-137.37)  243.28                80
 03/10/2018   22:14:35   (  -0.02,-135.22) (   0.52,-132.84)  271.25                80
 03/12/2018   10:39:01   (   0.03,-135.19) (   0.65,-138.10)  330.78                80
 03/13/2018   10:17:34   (   0.03,-135.17) (  -0.30,-133.56)  183.38                80