Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/16/2020   10:30:24   (   0.01,-137.20) (  -0.09,-136.73)   52.77                80
 06/18/2020   22:36:15   (  -0.00,-137.20) (  -0.09,-137.50)   34.49                80
 06/19/2020   22:14:50   (   0.00,-137.20) (   0.95,-132.97)  481.90                80
 06/21/2020   10:39:18   (  -0.00,-137.19) (   0.23,-138.24)  118.75                80
 06/22/2020   10:17:53   (  -0.01,-137.19) (  -0.81,-133.71)  397.07                80
 06/23/2020   22:39:49   (   0.01,-137.17) (  -0.40,-139.00)  208.68                80
 06/24/2020   22:23:43   (   0.01,-137.16) (   0.59,-134.46)  306.86                80
 06/26/2020   10:45:30   (  -0.01,-137.15) (   0.59,-139.73)  294.92                80
 06/27/2020   10:24:06   (  -0.01,-137.13) (  -0.45,-135.20)  220.32                80
 06/28/2020   22:46:01   (   0.01,-137.11) (  -0.76,-140.50)  386.34                80
 06/29/2020   22:29:57   (   0.01,-137.09) (   0.28,-135.97)  128.63                80