Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/05/2020   09:48:51   (  -0.04,-128.37) (  -0.61,-125.77)  295.29                80
 01/06/2020   22:08:06   (   0.05,-128.36) (  -0.57,-131.08)  310.02                80
 01/07/2020   21:52:01   (   0.04,-128.37) (   0.44,-126.54)  207.87                80
 01/09/2020   10:11:08   (  -0.04,-128.41) (   0.70,-131.82)  388.26                80
 01/10/2020   09:55:03   (  -0.04,-128.41) (  -0.31,-127.28)  129.24                80
 01/11/2020   22:14:18   (   0.04,-128.39) (  -0.87,-132.58)  477.22                80
 01/12/2020   21:58:12   (   0.04,-128.39) (   0.14,-128.05)   39.87                80
 01/15/2020   09:58:33   (  -0.04,-128.42) (   0.04,-128.78)   40.90                80
 01/16/2020   09:42:28   (  -0.04,-128.42) (  -0.97,-124.24)  475.90                80
 01/17/2020   22:04:23   (   0.05,-128.39) (  -0.20,-129.55)  131.10                80