Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/04/2020   22:48:48   (  -0.02,-137.23) (  -0.79,-140.55)  378.16                80
 01/05/2020   22:27:23   (  -0.02,-137.25) (   0.27,-136.02)  139.91                80
 01/07/2020   10:51:49   (   0.03,-137.26) (   0.92,-141.29)  458.21                80
 01/08/2020   10:30:24   (   0.03,-137.27) (  -0.09,-136.75)   59.13                80
 01/10/2020   22:36:14   (  -0.03,-137.28) (  -0.08,-137.52)   27.51                80
 01/11/2020   22:14:48   (  -0.03,-137.28) (   0.93,-132.99)  489.17                80
 01/13/2020   10:39:15   (   0.04,-137.28) (   0.27,-138.25)  110.74                80
 01/14/2020   10:17:49   (   0.03,-137.28) (  -0.74,-133.71)  405.51                80
 01/15/2020   22:42:24   (  -0.04,-137.27) (  -0.43,-139.02)  199.31                80
 01/16/2020   22:20:59   (  -0.03,-137.26) (   0.59,-134.48)  316.81                80