Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/21/2018   06:10:59   (   0.02, -75.18) (  -0.73, -71.96)  367.81                80
 01/22/2018   18:32:54   (  -0.02, -75.21) (  -0.45, -77.26)  232.90                80
 01/23/2018   18:16:48   (  -0.02, -75.22) (   0.55, -72.72)  284.54                80
 01/25/2018   06:38:35   (   0.02, -75.21) (   0.66, -77.98)  316.69                80
 01/26/2018   06:17:09   (   0.02, -75.21) (  -0.34, -73.45)  200.79                80
 01/27/2018   18:39:05   (  -0.03, -75.25) (  -0.83, -78.75)  399.57                80
 01/28/2018   18:22:59   (  -0.03, -75.26) (   0.17, -74.21)  118.17                80
 01/30/2018   06:44:46   (   0.04, -75.25) (   0.98, -79.49)  482.38                80
 01/31/2018   06:23:21   (   0.04, -75.26) (  -0.03, -74.95)   35.49                80
 02/02/2018   18:29:11   (  -0.04, -75.32) (  -0.14, -75.72)   45.48                80
 02/03/2018   18:07:45   (  -0.04, -75.34) (   0.87, -71.18)  473.23                80