Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/09/2020   10:11:07   (  -0.05,-128.41) (   0.74,-131.81)  387.99                80
 01/10/2020   09:55:02   (  -0.04,-128.41) (  -0.27,-127.27)  129.63                80
 01/11/2020   22:14:17   (   0.04,-128.40) (  -0.91,-132.57)  476.43                80
 01/12/2020   21:58:12   (   0.04,-128.40) (   0.10,-128.04)   40.69                80
 01/15/2020   09:58:33   (  -0.04,-128.43) (   0.02,-128.78)   39.88                80
 01/16/2020   09:42:28   (  -0.04,-128.43) (  -0.99,-124.25)  477.05                80
 01/17/2020   22:01:43   (   0.05,-128.41) (  -0.18,-129.55)  129.62                80
 01/18/2020   21:45:37   (   0.04,-128.40) (   0.77,-125.00)  387.05                80
 01/20/2020   10:04:44   (  -0.04,-128.42) (   0.37,-130.28)  211.32                80
 01/21/2020   09:48:39   (  -0.03,-128.42) (  -0.64,-125.74)  305.11                80