Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2019   22:33:57   (  -0.01,-137.19) (  -0.08,-137.58)   45.02                80
 12/10/2019   22:15:11   (  -0.01,-137.18) (   0.92,-133.05)  470.91                80
 12/12/2019   10:39:38   (   0.01,-137.17) (   0.28,-138.31)  130.22                80
 12/13/2019   10:18:12   (   0.01,-137.16) (  -0.72,-133.77)  384.92                80
 12/14/2019   22:42:48   (  -0.01,-137.13) (  -0.42,-139.09)  222.44                80
 12/15/2019   22:21:23   (  -0.00,-137.11) (   0.58,-134.55)  292.27                80
 12/17/2019   10:45:49   (   0.01,-137.09) (   0.62,-139.81)  310.22                80
 12/18/2019   10:24:24   (  -0.00,-137.07) (  -0.38,-135.28)  204.12                80
 12/19/2019   22:48:59   (  -0.00,-137.04) (  -0.81,-140.58)  404.13                80
 12/20/2019   22:27:34   (  -0.00,-137.02) (   0.19,-136.04)  110.12                80
 12/22/2019   10:52:01   (   0.01,-136.99) (   0.95,-141.32)  492.96                80