Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/14/2019   22:02:35   (   0.06,-128.14) (  -0.26,-129.71)  177.98                80
 01/15/2019   21:46:30   (   0.06,-128.11) (   0.72,-125.17)  335.42                80
 01/17/2019   10:05:37   (  -0.06,-128.16) (   0.46,-130.44)  259.39                80
 01/18/2019   09:49:33   (  -0.05,-128.13) (  -0.58,-125.91)  253.46                80
 01/19/2019   22:08:47   (   0.06,-127.97) (  -0.69,-131.20)  368.53                80
 01/20/2019   21:52:43   (   0.05,-127.93) (   0.36,-126.67)  143.87                80
 01/22/2019   10:11:50   (  -0.06,-127.97) (   0.83,-131.94)  452.28                80
 01/23/2019   09:55:44   (  -0.05,-127.93) (  -0.15,-127.40)   59.89                80
 01/25/2019   21:56:14   (   0.06,-127.72) (  -0.06,-128.16)   50.72                80
 01/26/2019   21:40:10   (   0.05,-127.68) (   0.98,-123.63)  461.30                80