Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/16/2017   18:29:40   (  -0.01, -75.23) (  -0.12, -75.81)   65.11                80
 12/17/2017   18:08:14   (  -0.01, -75.24) (   0.87, -71.27)  451.86                80
 12/19/2017   06:30:02   (   0.02, -75.21) (   0.30, -76.54)  151.70                80
 12/20/2017   06:13:56   (   0.02, -75.21) (  -0.69, -72.00)  365.71                80
 12/21/2017   18:35:52   (  -0.03, -75.27) (  -0.45, -77.32)  232.78                80
 12/22/2017   18:14:27   (  -0.03, -75.28) (   0.54, -72.78)  284.76                80
 12/24/2017   06:36:14   (   0.03, -75.25) (   0.63, -78.05)  318.20                80
 12/25/2017   06:20:09   (   0.03, -75.27) (  -0.36, -73.51)  199.80                80
 12/26/2017   18:42:04   (  -0.03, -75.33) (  -0.84, -78.81)  397.39                80
 12/27/2017   18:20:40   (  -0.03, -75.34) (   0.22, -74.29)  120.71                80
 12/29/2017   06:42:27   (   0.04, -75.32) (   0.96, -79.56)  481.78                80