Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/22/2018   10:37:23   (   0.20,-135.47) (   0.79,-138.21)  311.48                80
 10/23/2018   10:21:18   (   0.22,-135.45) (  -0.18,-133.67)  202.41                80
 10/24/2018   22:40:34   (  -0.19,-135.35) (  -0.99,-138.98)  413.18                80
 10/25/2018   22:24:29   (  -0.20,-135.33) (  -0.01,-134.44)  100.75                80
 10/27/2018   10:43:37   (   0.18,-135.34) (   1.14,-139.72)  498.99                80
 10/28/2018   10:27:32   (   0.19,-135.31) (   0.16,-135.19)   13.80                80
 10/30/2018   22:28:02   (  -0.18,-135.15) (  -0.35,-135.96)   91.88                80
 10/31/2018   22:11:57   (  -0.19,-135.11) (   0.63,-131.42)  420.75                80
 11/02/2018   10:31:05   (   0.16,-135.12) (   0.49,-136.70)  180.18                80
 11/03/2018   10:15:00   (   0.17,-135.08) (  -0.49,-132.17)  331.84                80
 11/04/2018   22:34:16   (  -0.14,-134.94) (  -0.68,-137.48)  288.01                80