Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/07/2017   06:55:26   (   0.01, -80.72) (   0.48, -82.85)  243.23                80
 12/08/2017   06:39:16   (   0.02, -79.38) (  -0.21, -78.25)  128.79                80
 12/10/2017   18:39:35   (  -0.01, -76.05) (  -0.66, -78.86)  321.61                80
 12/11/2017   18:23:25   (  -0.01, -74.72) (   0.09, -74.27)   51.06                80
 12/12/2017   18:04:36   (  -0.01, -73.40) (   0.85, -69.68)  424.19                80
 12/14/2017   06:23:35   (   0.02, -71.36) (   0.80, -74.85)  397.84                80
 12/15/2017   06:04:45   (   0.02, -70.04) (   0.04, -70.26)   24.56                80
 12/16/2017   05:48:35   (   0.02, -68.72) (  -0.65, -65.66)  348.86                80
 12/17/2017   18:07:43   (  -0.02, -66.72) (  -0.96, -70.86)  472.34                80
 12/18/2017   17:48:54   (  -0.02, -65.41) (  -0.21, -66.27)   98.47                80