Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/11/2020   10:24:11   (   0.00,-137.18) (  -0.42,-135.23)  222.20                80
 06/12/2020   22:48:47   (  -0.01,-137.19) (  -0.73,-140.54)  381.63                80
 06/13/2020   22:27:22   (  -0.00,-137.19) (   0.25,-136.00)  135.14                80
 06/15/2020   10:51:49   (   0.01,-137.19) (   0.93,-141.26)  464.76                80
 06/16/2020   10:30:24   (   0.00,-137.19) (  -0.11,-136.74)   51.52                80
 06/18/2020   22:33:35   (   0.00,-137.17) (  -0.06,-137.50)   37.74                80
 06/19/2020   22:17:30   (   0.01,-137.16) (   0.92,-132.96)  477.95                80
 06/21/2020   10:39:17   (  -0.01,-137.15) (   0.26,-138.23)  123.76                80
 06/22/2020   10:17:53   (  -0.00,-137.14) (  -0.78,-133.70)  391.44                80
 06/23/2020   22:39:48   (  -0.00,-137.11) (  -0.43,-139.00)  215.51                80