Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2019   10:52:34   (  -0.03,-137.21) (   0.89,-141.40)  476.56                80
 07/16/2019   10:31:09   (  -0.03,-137.21) (  -0.11,-136.86)   39.76                80
 07/18/2019   22:34:21   (   0.03,-137.19) (  -0.09,-137.63)   50.99                80
 07/19/2019   22:18:17   (   0.03,-137.19) (   0.91,-133.10)  465.29                80
 07/21/2019   10:37:25   (  -0.03,-137.20) (   0.24,-138.37)  133.82                80
 07/22/2019   10:21:20   (  -0.03,-137.19) (  -0.77,-133.84)  382.02                80
 07/23/2019   22:40:38   (   0.03,-137.16) (  -0.39,-139.15)  226.00                80
 07/24/2019   22:24:33   (   0.03,-137.15) (   0.62,-134.62)  289.59                80
 07/26/2019   10:43:40   (  -0.04,-137.16) (   0.60,-139.88)  310.54                80
 07/27/2019   10:27:36   (  -0.04,-137.15) (  -0.41,-135.35)  204.37                80
 07/28/2019   22:46:53   (   0.05,-137.10) (  -0.74,-140.66)  405.59                80