Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 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)
 04/19/2019   09:39:55   (   0.07,-127.69) (  -0.72,-124.21)  396.84                80
 04/20/2019   22:01:52   (  -0.06,-127.75) (  -0.48,-129.52)  201.80                80
 04/21/2019   21:45:49   (  -0.06,-127.79) (   0.56,-124.99)  318.64                80
 04/23/2019   10:07:38   (   0.06,-127.85) (   0.58,-130.28)  275.85                80
 04/24/2019   09:46:14   (   0.06,-127.88) (  -0.41,-125.74)  244.14                80
 04/25/2019   22:08:12   (  -0.06,-127.93) (  -0.73,-131.06)  355.66                80
 04/26/2019   21:52:08   (  -0.07,-127.97) (   0.25,-126.52)  164.37                80
 04/28/2019   10:13:57   (   0.06,-128.02) (   0.89,-131.80)  430.41                80
 04/29/2019   09:52:32   (   0.07,-128.06) (  -0.10,-127.27)   89.26                80
 05/01/2019   21:58:26   (  -0.07,-128.13) (  -0.05,-128.05)    8.23                80