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)
 01/10/2020   22:33:34   (  -0.04,-137.19) (  -0.08,-137.52)   36.86                80
 01/11/2020   22:14:48   (  -0.03,-137.18) (   0.93,-132.98)  478.67                80
 01/13/2020   10:39:15   (   0.04,-137.16) (   0.27,-138.25)  123.29                80
 01/14/2020   10:17:49   (   0.04,-137.15) (  -0.74,-133.71)  391.68                80
 01/15/2020   22:42:23   (  -0.04,-137.12) (  -0.49,-139.00)  215.05                80
 01/16/2020   22:20:58   (  -0.04,-137.10) (   0.52,-134.47)  299.84                80
 01/18/2020   10:45:25   (   0.05,-137.08) (   0.62,-139.74)  302.77                80
 01/19/2020   10:24:00   (   0.05,-137.06) (  -0.39,-135.21)  211.65                80
 01/20/2020   22:48:34   (  -0.06,-137.02) (  -0.83,-140.50)  396.22                80
 01/21/2020   22:27:09   (  -0.06,-137.00) (   0.18,-135.96)  117.90                80