Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2019   10:01:19   (   0.06,-127.65) (   0.28,-128.74)  123.52                80
 04/19/2019   09:39:55   (   0.07,-127.69) (  -0.70,-124.21)  397.00                80
 04/20/2019   22:01:53   (  -0.06,-127.75) (  -0.44,-129.53)  201.88                80
 04/21/2019   21:45:49   (  -0.06,-127.79) (   0.54,-124.99)  318.58                80
 04/23/2019   10:07:38   (   0.06,-127.85) (   0.60,-130.27)  275.61                80
 04/24/2019   09:46:14   (   0.06,-127.89) (  -0.44,-125.75)  244.40                80
 04/25/2019   22:08:12   (  -0.06,-127.93) (  -0.76,-131.05)  355.62                80
 04/26/2019   21:52:07   (  -0.07,-127.97) (   0.23,-126.52)  164.43                80
 04/28/2019   10:13:57   (   0.06,-128.03) (   0.92,-131.80)  430.11                80
 04/29/2019   09:52:33   (   0.07,-128.06) (  -0.13,-127.28)   89.59                80