Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/23/2020   22:42:28   (  -0.00,-137.19) (  -0.43,-138.99)  205.91                80
 06/24/2020   22:21:03   (  -0.00,-137.19) (   0.61,-134.47)  310.31                80
 06/26/2020   10:45:31   (   0.01,-137.18) (   0.57,-139.73)  290.12                80
 06/27/2020   10:24:05   (   0.01,-137.18) (  -0.42,-135.19)  225.85                80
 06/28/2020   22:48:42   (  -0.02,-137.16) (  -0.74,-140.50)  379.89                80
 06/29/2020   22:27:16   (  -0.01,-137.15) (   0.25,-135.96)  135.59                80
 07/01/2020   10:51:43   (   0.00,-137.14) (   0.93,-141.23)  466.33                80
 07/02/2020   10:30:19   (  -0.01,-137.12) (  -0.12,-136.70)   48.58                80
 07/04/2020   22:33:30   (   0.01,-137.08) (  -0.05,-137.47)   44.00                80
 07/05/2020   22:17:24   (   0.01,-137.06) (   0.94,-132.93)  470.77                80