Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2019   22:34:22   (   0.03,-137.19) (  -0.06,-137.64)   50.20                80
 07/19/2019   22:18:17   (   0.03,-137.19) (   0.95,-133.11)  466.39                80
 07/21/2019   10:40:05   (  -0.03,-137.21) (   0.20,-138.38)  132.70                80
 07/22/2019   10:18:41   (  -0.03,-137.21) (  -0.81,-133.85)  383.55                80
 07/23/2019   22:40:37   (   0.03,-137.19) (  -0.41,-139.14)  223.23                80
 07/24/2019   22:24:33   (   0.03,-137.18) (   0.60,-134.61)  292.72                80
 07/26/2019   10:46:21   (  -0.04,-137.19) (   0.56,-139.89)  307.34                80
 07/27/2019   10:27:37   (  -0.04,-137.18) (  -0.46,-135.35)  207.93                80
 07/28/2019   22:46:53   (   0.04,-137.14) (  -0.76,-140.65)  400.79                80
 07/29/2019   22:30:48   (   0.04,-137.12) (   0.26,-136.12)  113.98                80
 07/31/2019   10:49:57   (  -0.05,-137.12) (   0.90,-141.40)  487.64                80
 08/01/2019   10:33:52   (  -0.05,-137.10) (  -0.11,-136.86)   26.62                80