Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 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)
 01/08/2020   10:30:24   (   0.03,-137.21) (  -0.08,-136.75)   53.04                80
 01/10/2020   22:33:34   (  -0.04,-137.19) (  -0.09,-137.52)   36.97                80
 01/11/2020   22:14:48   (  -0.03,-137.18) (   0.92,-132.98)  478.44                80
 01/13/2020   10:39:14   (   0.04,-137.16) (   0.28,-138.24)  123.51                80
 01/14/2020   10:17:49   (   0.04,-137.14) (  -0.73,-133.71)  391.42                80
 01/15/2020   22:42:24   (  -0.04,-137.12) (  -0.44,-139.01)  215.45                80
 01/16/2020   22:20:59   (  -0.04,-137.10) (   0.57,-134.48)  299.39                80
 01/18/2020   10:45:25   (   0.05,-137.07) (   0.63,-139.74)  303.21                80
 01/19/2020   10:24:00   (   0.05,-137.05) (  -0.39,-135.20)  211.15                80
 01/20/2020   22:48:34   (  -0.06,-137.01) (  -0.84,-140.50)  396.83                80
 01/21/2020   22:27:08   (  -0.05,-136.99) (   0.17,-135.96)  117.25                80