Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2019   10:01:31   (   0.06,-128.16) (   0.19,-128.80)   72.39                80
 05/05/2019   09:40:07   (   0.07,-128.18) (  -0.80,-124.27)  446.31                80
 05/06/2019   22:02:04   (  -0.06,-128.22) (  -0.39,-129.57)  154.70                80
 05/07/2019   21:46:01   (  -0.06,-128.24) (   0.66,-125.05)  363.69                80
 05/09/2019   10:05:09   (   0.05,-128.26) (   0.54,-130.32)  235.15                80
 05/10/2019   09:49:05   (   0.06,-128.28) (  -0.51,-125.80)  282.67                80
 05/11/2019   22:08:23   (  -0.05,-128.30) (  -0.67,-131.11)  319.88                80
 05/12/2019   21:52:18   (  -0.06,-128.31) (   0.32,-126.57)  197.93                80
 05/14/2019   10:11:28   (   0.05,-128.33) (   0.83,-131.85)  401.29                80
 05/15/2019   09:55:23   (   0.05,-128.34) (  -0.16,-127.32)  116.17                80
 05/16/2019   22:14:40   (  -0.04,-128.35) (  -1.01,-132.63)  487.28                80
 05/17/2019   21:58:37   (  -0.04,-128.36) (   0.04,-128.10)   30.20                80