Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 11 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2018   10:12:00   (   0.07,-128.24) (   0.89,-131.90)  417.19                80
 11/20/2018   09:55:55   (   0.08,-128.26) (  -0.13,-127.37)  102.38                80
 11/22/2018   21:59:07   (  -0.07,-128.23) (  -0.05,-128.15)    9.67                80
 11/25/2018   10:00:10   (   0.06,-128.39) (   0.16,-128.90)   57.33                41
 11/26/2018   09:43:26   (   0.08,-128.41) (  -0.80,-124.36)  461.06                80
 11/27/2018   22:02:43   (  -0.05,-128.33) (  -0.34,-129.68)  153.45                80
 11/28/2018   21:46:37   (  -0.06,-128.35) (   0.63,-125.14)  365.12                80
 11/30/2018   10:05:47   (   0.03,-128.48) (   0.45,-130.43)  221.29                80
 12/01/2018   09:49:41   (   0.05,-128.50) (  -0.52,-125.89)  296.76                80