Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/14/2020   22:48:55   (  -0.03,-137.21) (  -0.80,-140.53)  379.44                80
 07/15/2020   22:27:31   (  -0.02,-137.21) (   0.24,-136.01)  137.39                80
 07/17/2020   10:52:00   (   0.02,-137.22) (   0.95,-141.27)  463.12                80
 07/18/2020   10:30:36   (   0.01,-137.22) (  -0.09,-136.75)   52.94                80
 07/20/2020   22:33:50   (   0.02,-137.22) (  -0.04,-137.54)   36.41                80
 07/21/2020   22:17:46   (   0.02,-137.21) (   0.94,-133.00)  479.33                80
 07/23/2020   10:39:34   (  -0.02,-137.20) (   0.25,-138.27)  122.62                80
 07/24/2020   10:18:10   (  -0.01,-137.19) (  -0.80,-133.75)  392.86                80
 07/25/2020   22:40:08   (   0.01,-137.18) (  -0.39,-139.05)  213.12                80
 07/26/2020   22:24:03   (   0.01,-137.17) (   0.60,-134.52)  302.06                80