Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/06/2020   22:08:06   (   0.05,-128.36) (  -0.58,-131.07)  309.86                80
 01/07/2020   21:52:01   (   0.04,-128.37) (   0.43,-126.54)  208.12                80
 01/09/2020   10:11:08   (  -0.05,-128.41) (   0.70,-131.81)  388.04                80
 01/10/2020   09:55:02   (  -0.04,-128.41) (  -0.31,-127.28)  129.51                80
 01/11/2020   22:14:18   (   0.04,-128.39) (  -0.87,-132.58)  476.70                80
 01/12/2020   21:58:12   (   0.04,-128.40) (   0.14,-128.05)   40.41                80
 01/15/2020   09:58:33   (  -0.04,-128.42) (   0.04,-128.78)   40.22                80
 01/16/2020   09:42:28   (  -0.04,-128.43) (  -0.97,-124.24)  476.65                80
 01/17/2020   22:01:43   (   0.05,-128.40) (  -0.20,-129.54)  130.13                80
 01/18/2020   21:45:37   (   0.04,-128.40) (   0.81,-125.01)  386.45                80
 01/20/2020   10:04:44   (  -0.04,-128.42) (   0.39,-130.27)  211.92                80