Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2019   22:46:14   (   0.01,-137.19) (  -0.76,-140.56)  384.52                80
 04/24/2019   22:30:11   (   0.01,-137.19) (   0.28,-136.04)  131.28                80
 04/26/2019   10:51:59   (  -0.01,-137.19) (   0.92,-141.31)  469.10                80
 04/27/2019   10:30:35   (  -0.01,-137.18) (  -0.13,-136.79)   46.05                80
 04/29/2019   22:33:48   (   0.01,-137.15) (  -0.08,-137.56)   46.61                80
 04/30/2019   22:17:45   (   0.01,-137.14) (   0.97,-133.04)  468.66                80
 05/02/2019   10:39:33   (  -0.01,-137.14) (   0.23,-138.30)  132.30                80
 05/03/2019   10:18:09   (  -0.02,-137.12) (  -0.75,-133.77)  382.07                80
 05/04/2019   22:40:06   (   0.02,-137.08) (  -0.43,-139.08)  227.63                80
 05/05/2019   22:24:02   (   0.03,-137.06) (   0.62,-134.55)  286.70                80
 05/07/2019   10:45:51   (  -0.03,-137.06) (   0.59,-139.82)  315.21                80