Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/25/2019   22:36:25   (  -0.02,-137.17) (  -0.13,-137.55)   43.82                80
 12/26/2019   22:15:00   (  -0.02,-137.15) (   0.88,-133.01)  470.64                80
 12/28/2019   10:39:27   (   0.02,-137.12) (   0.26,-138.29)  132.88                80
 12/29/2019   10:18:02   (   0.02,-137.09) (  -0.75,-133.75)  381.30                80
 12/30/2019   22:42:37   (  -0.02,-137.06) (  -0.44,-139.05)  226.65                80
 12/31/2019   22:21:11   (  -0.02,-137.03) (   0.57,-134.52)  287.33                80
 01/02/2020   10:45:38   (   0.02,-137.00) (   0.63,-139.78)  316.71                80
 01/03/2020   10:24:12   (   0.02,-136.97) (  -0.37,-135.24)  196.98                80
 01/04/2020   22:48:48   (  -0.03,-136.93) (  -0.81,-140.55)  411.70                80
 01/05/2020   22:27:22   (  -0.02,-136.90) (   0.20,-136.01)  101.63                80