Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2019   22:27:35   (  -0.01,-137.22) (   0.25,-136.05)  132.45                80
 12/22/2019   10:52:01   (   0.02,-137.21) (   0.94,-141.32)  468.26                80
 12/23/2019   10:30:35   (   0.02,-137.20) (  -0.06,-136.78)   47.67                80
 12/25/2019   22:36:25   (  -0.02,-137.18) (  -0.13,-137.55)   42.26                80
 12/26/2019   22:15:01   (  -0.02,-137.17) (   0.94,-133.02)  473.20                80
 12/28/2019   10:39:27   (   0.02,-137.15) (   0.26,-138.29)  128.84                80
 12/29/2019   10:18:02   (   0.02,-137.14) (  -0.75,-133.75)  386.25                80
 12/30/2019   22:42:37   (  -0.02,-137.12) (  -0.43,-139.05)  220.05                80
 12/31/2019   22:21:11   (  -0.02,-137.10) (   0.58,-134.52)  294.92                80
 01/02/2020   10:45:38   (   0.03,-137.08) (   0.62,-139.78)  307.59                80