Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/08/2017   06:39:17   (  -0.01, -79.42) (  -0.26, -78.26)  131.61                80
 12/10/2017   18:39:35   (   0.01, -76.09) (  -0.62, -78.88)  317.51                80
 12/11/2017   18:23:26   (   0.01, -74.77) (   0.12, -74.29)   55.73                80
 12/12/2017   18:04:37   (   0.02, -73.46) (   0.87, -69.69)  429.41                80
 12/14/2017   06:23:36   (  -0.01, -71.43) (   0.79, -74.86)  391.41                80
 12/15/2017   06:04:46   (  -0.01, -70.12) (   0.04, -70.27)   17.47                80
 12/16/2017   05:48:37   (  -0.01, -68.80) (  -0.70, -65.68)  356.48                80
 12/17/2017   18:07:45   (  -0.00, -66.81) (  -0.93, -70.88)  463.87                80
 12/18/2017   17:48:56   (  -0.00, -65.51) (  -0.18, -66.29)   89.45                80
 12/19/2017   17:32:46   (   0.00, -64.20) (   0.56, -61.70)  284.83                80