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   22:27:34   (  -0.01,-137.22) (   0.22,-136.05)  132.67                80
 12/22/2019   10:52:01   (   0.02,-137.21) (   0.91,-141.32)  468.15                80
 12/23/2019   10:30:36   (   0.02,-137.20) (  -0.09,-136.79)   47.85                80
 12/25/2019   22:36:26   (  -0.02,-137.18) (  -0.09,-137.55)   41.80                80
 12/26/2019   22:15:00   (  -0.02,-137.17) (   0.91,-133.02)  473.66                80
 12/28/2019   10:39:27   (   0.02,-137.16) (   0.28,-138.28)  128.43                80
 12/29/2019   10:18:01   (   0.02,-137.14) (  -0.72,-133.75)  386.71                80
 12/30/2019   22:42:36   (  -0.02,-137.12) (  -0.46,-139.05)  219.39                80
 12/31/2019   22:21:11   (  -0.02,-137.11) (   0.55,-134.51)  295.63                80
 01/02/2020   10:45:37   (   0.03,-137.09) (   0.65,-139.78)  306.97                80
 01/03/2020   10:24:12   (   0.02,-137.07) (  -0.36,-135.24)  207.75                80