Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/12/2017   18:04:36   (  -0.01, -73.47) (   0.86, -69.69)  432.02                80
 12/14/2017   06:23:35   (   0.01, -71.44) (   0.78, -74.85)  389.05                80
 12/15/2017   06:04:46   (   0.01, -70.13) (   0.02, -70.26)   15.00                80
 12/16/2017   05:48:35   (   0.01, -68.82) (  -0.67, -65.66)  359.28                80
 12/17/2017   18:07:43   (  -0.02, -66.83) (  -0.94, -70.87)  460.26                80
 12/18/2017   17:48:54   (  -0.02, -65.53) (  -0.19, -66.28)   85.59                80
 12/19/2017   17:32:45   (  -0.02, -64.22) (   0.57, -61.69)  288.95                80
 12/22/2017   05:32:54   (   0.02, -60.90) (   0.32, -62.26)  155.55                80
 12/23/2017   05:16:45   (   0.01, -59.59) (  -0.43, -57.67)  219.47                80
 12/25/2017   17:17:03   (  -0.02, -56.33) (  -0.47, -58.28)  222.84                80