Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/22/2019   10:24:17   (  -0.01,-137.20) (  -0.43,-135.26)  221.85                80
 04/23/2019   22:46:14   (   0.00,-137.19) (  -0.77,-140.56)  384.83                80
 04/24/2019   22:30:10   (  -0.00,-137.19) (   0.27,-136.04)  131.30                80
 04/26/2019   10:51:59   (   0.00,-137.20) (   0.92,-141.31)  468.37                80
 04/27/2019   10:30:34   (   0.00,-137.19) (  -0.06,-136.77)   47.07                80
 04/29/2019   22:33:48   (  -0.01,-137.15) (  -0.09,-137.56)   45.86                80
 04/30/2019   22:17:44   (  -0.01,-137.14) (   0.90,-133.02)  469.55                80
 05/02/2019   10:39:33   (  -0.00,-137.15) (   0.25,-138.30)  130.99                80
 05/03/2019   10:18:08   (  -0.00,-137.13) (  -0.74,-133.77)  383.52                80
 05/04/2019   22:40:06   (   0.01,-137.09) (  -0.44,-139.07)  226.65                80
 05/05/2019   22:24:02   (   0.01,-137.07) (   0.60,-134.55)  287.84                80