Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 11 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/21/2017   19:36:44   (  -0.00, -89.30) (  -0.83, -93.10)  432.49                80
 11/22/2017   19:20:38   (  -0.01, -89.31) (   0.15, -88.57)   84.53                80
 11/25/2017   07:21:00   (   0.01, -89.31) (   0.04, -89.30)    3.03                80
 11/27/2017   19:24:12   (  -0.02, -89.34) (  -0.17, -90.08)   84.19                80
 11/28/2017   19:08:07   (  -0.02, -89.35) (   0.81, -85.54)  433.25                80
 11/30/2017   07:29:54   (   0.02, -89.35) (   0.36, -90.81)  166.82                80
 12/01/2017   07:08:29   (   0.02, -89.36) (  -0.68, -86.29)  350.51                80
 12/02/2017   19:30:25   (  -0.03, -89.38) (  -0.54, -91.59)  251.57                80
 12/03/2017   19:14:20   (  -0.03, -89.39) (   0.51, -87.06)  265.94                80