Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 7 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)
 07/22/2019   10:18:40   (  -0.02,-137.20) (  -0.77,-133.84)  382.82                80
 07/23/2019   22:40:38   (   0.03,-137.18) (  -0.39,-139.15)  223.61                80
 07/24/2019   22:24:33   (   0.03,-137.18) (   0.62,-134.62)  292.17                80
 07/26/2019   10:46:21   (  -0.03,-137.17) (   0.59,-139.88)  308.71                80
 07/27/2019   10:24:56   (  -0.03,-137.16) (  -0.42,-135.35)  206.37                80
 07/28/2019   22:46:53   (   0.04,-137.13) (  -0.74,-140.66)  402.02                80
 07/29/2019   22:30:49   (   0.04,-137.11) (   0.27,-136.13)  112.56                80
 07/31/2019   10:49:56   (  -0.04,-137.09) (   0.94,-141.39)  489.88                80
 08/01/2019   10:31:12   (  -0.04,-137.07) (  -0.07,-136.85)   24.26                80
 08/03/2019   22:34:25   (   0.05,-137.00) (  -0.07,-137.63)   71.80                80
 08/04/2019   22:18:19   (   0.05,-136.98) (   0.89,-133.09)  442.18                80