Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 5.  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) (  -0.56,-131.08)  309.91                80
 01/07/2020   21:52:01   (   0.04,-128.37) (   0.45,-126.54)  208.02                80
 01/09/2020   10:11:07   (  -0.05,-128.41) (   0.74,-131.81)  388.12                80
 01/10/2020   09:55:02   (  -0.04,-128.41) (  -0.27,-127.27)  129.42                80
 01/11/2020   22:14:17   (   0.04,-128.39) (  -0.91,-132.57)  476.93                80
 01/12/2020   21:58:12   (   0.04,-128.39) (   0.11,-128.04)   40.08                80
 01/15/2020   09:58:33   (  -0.04,-128.42) (   0.02,-128.78)   40.56                80
 01/16/2020   09:42:28   (  -0.04,-128.42) (  -0.99,-124.25)  476.32                80
 01/17/2020   22:01:42   (   0.05,-128.40) (  -0.23,-129.54)  130.60                80
 01/18/2020   21:45:37   (   0.04,-128.39) (   0.78,-125.00)  385.97                80