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)
 07/16/2019   10:31:09   (  -0.03,-137.21) (  -0.10,-136.86)   39.70                80
 07/18/2019   22:34:22   (   0.03,-137.19) (  -0.05,-137.64)   51.03                80
 07/19/2019   22:18:17   (   0.03,-137.18) (   0.96,-133.11)  465.18                80
 07/21/2019   10:37:25   (  -0.03,-137.20) (   0.26,-138.37)  134.05                80
 07/22/2019   10:21:21   (  -0.03,-137.19) (  -0.81,-133.85)  381.79                80
 07/23/2019   22:40:37   (   0.03,-137.16) (  -0.41,-139.15)  226.23                80
 07/24/2019   22:24:33   (   0.03,-137.15) (   0.60,-134.61)  289.31                80
 07/26/2019   10:43:41   (  -0.04,-137.16) (   0.56,-139.89)  310.90                80
 07/27/2019   10:27:37   (  -0.04,-137.14) (  -0.45,-135.36)  203.95                80
 07/28/2019   22:46:53   (   0.05,-137.09) (  -0.76,-140.65)  406.01                80