Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/07/2019   10:04:52   (   0.05,-127.94) (   0.56,-130.26)  264.01                80
 04/08/2019   09:48:47   (   0.05,-127.91) (  -0.45,-125.72)  249.40                80
 04/09/2019   22:08:02   (  -0.05,-127.84) (  -0.74,-131.02)  361.99                80
 04/10/2019   21:51:56   (  -0.06,-127.80) (   0.26,-126.48)  150.87                80
 04/12/2019   10:11:02   (   0.06,-127.76) (   0.98,-131.73)  453.77                80
 04/13/2019   09:54:56   (   0.06,-127.72) (  -0.03,-127.20)   58.81                80
 04/15/2019   21:55:26   (  -0.06,-127.60) (  -0.14,-127.96)   41.36                80
 04/16/2019   21:39:21   (  -0.07,-127.55) (   0.87,-123.43)  470.85                80
 04/18/2019   09:58:27   (   0.06,-127.50) (   0.32,-128.69)  134.64                80
 04/19/2019   09:42:21   (   0.07,-127.46) (  -0.69,-124.15)  377.50                80