Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2020   22:15:05   (  -0.01,-137.19) (   0.91,-132.99)  478.41                80
 07/23/2020   10:39:33   (   0.01,-137.20) (   0.27,-138.26)  121.44                80
 07/24/2020   10:18:10   (   0.01,-137.20) (  -0.77,-133.74)  395.09                80
 07/25/2020   22:40:07   (  -0.01,-137.20) (  -0.41,-139.05)  209.68                80
 07/26/2020   22:24:03   (  -0.01,-137.20) (   0.58,-134.51)  306.54                80
 07/28/2020   10:45:51   (   0.01,-137.20) (   0.61,-139.78)  294.24                80
 07/29/2020   10:24:27   (   0.02,-137.20) (  -0.44,-135.26)  221.58                80
 07/30/2020   22:46:24   (  -0.02,-137.18) (  -0.80,-140.55)  384.44                80
 07/31/2020   22:30:20   (  -0.03,-137.18) (   0.25,-136.03)  131.00                80
 08/02/2020   10:49:29   (   0.03,-137.16) (   0.93,-141.30)  470.94                80
 08/03/2020   10:33:24   (   0.03,-137.15) (  -0.06,-136.76)   44.21                80