Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/01/2018   18:26:51   (  -0.02, -75.16) (  -0.18, -75.77)   70.25                80
 01/02/2018   18:08:06   (  -0.02, -75.16) (   0.87, -71.25)  445.75                80
 01/04/2018   06:32:33   (   0.01, -75.12) (   0.30, -76.52)  158.52                80
 01/05/2018   06:11:08   (   0.00, -75.12) (  -0.70, -71.98)  357.76                80
 01/06/2018   18:35:43   (   0.00, -75.15) (  -0.49, -77.28)  243.08                80
 01/07/2018   18:14:19   (   0.01, -75.16) (   0.57, -72.76)  273.86                80
 01/09/2018   06:38:45   (  -0.01, -75.14) (   0.66, -78.02)  328.61                80
 01/10/2018   06:17:21   (  -0.01, -75.15) (  -0.40, -73.50)  188.76                80
 01/11/2018   18:41:56   (   0.00, -75.19) (  -0.78, -78.80)  410.59                80
 01/12/2018   18:20:30   (   0.00, -75.20) (   0.22, -74.26)  107.21                80