Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2019   10:11:50   (  -0.06,-127.98) (   0.81,-131.94)  450.83                80
 01/23/2019   09:55:45   (  -0.05,-127.94) (  -0.17,-127.40)   61.62                80
 01/25/2019   21:56:15   (   0.06,-127.75) (  -0.05,-128.16)   47.50                80
 01/26/2019   21:40:10   (   0.06,-127.71) (   1.00,-123.64)  464.86                80
 01/28/2019   09:59:18   (  -0.06,-127.75) (   0.19,-128.90)  131.72                80
 01/29/2019   09:43:12   (  -0.05,-127.70) (  -0.80,-124.37)  380.43                80
 01/30/2019   22:02:27   (   0.05,-127.54) (  -0.40,-129.66)  241.59                80
 01/31/2019   21:46:22   (   0.05,-127.50) (   0.58,-125.13)  270.27                80
 02/02/2019   10:05:29   (  -0.05,-127.52) (   0.61,-130.39)  327.17                80
 02/03/2019   09:49:24   (  -0.04,-127.48) (  -0.38,-125.85)  184.51                80