Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/11/2019   10:30:23   (  -0.01,-137.22) (  -0.11,-136.74)   54.46                80
 04/13/2019   22:33:33   (   0.00,-137.19) (  -0.07,-137.50)   35.54                80
 04/14/2019   22:17:27   (   0.00,-137.18) (   0.95,-132.96)  480.84                80
 04/16/2019   10:39:14   (  -0.01,-137.19) (   0.24,-138.23)  118.27                80
 04/17/2019   10:17:49   (  -0.02,-137.18) (  -0.83,-133.70)  397.10                80
 04/18/2019   22:39:43   (   0.03,-137.15) (  -0.41,-138.99)  210.82                80
 04/19/2019   22:23:38   (   0.03,-137.14) (   0.61,-134.46)  305.04                80
 04/21/2019   10:45:24   (  -0.03,-137.15) (   0.58,-139.72)  293.98                80
 04/22/2019   10:23:59   (  -0.03,-137.13) (  -0.44,-135.18)  221.15                80
 04/23/2019   22:45:54   (   0.03,-137.08) (  -0.74,-140.48)  388.57                80
 04/24/2019   22:29:49   (   0.03,-137.06) (   0.28,-135.95)  126.61                80