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) (   0.73,-131.81)  388.06                80
 01/10/2020   09:55:02   (  -0.04,-128.41) (  -0.28,-127.27)  129.57                80
 01/11/2020   22:14:17   (   0.05,-128.40) (  -0.90,-132.58)  476.30                80
 01/12/2020   21:58:12   (   0.04,-128.40) (   0.11,-128.04)   40.83                80
 01/15/2020   09:58:34   (  -0.05,-128.43) (   0.01,-128.78)   39.78                80
 01/16/2020   09:42:28   (  -0.04,-128.43) (  -1.00,-124.25)  477.23                80
 01/17/2020   22:01:42   (   0.05,-128.41) (  -0.23,-129.54)  129.28                80
 01/18/2020   21:45:37   (   0.04,-128.41) (   0.78,-125.00)  387.42                80
 01/20/2020   10:04:44   (  -0.04,-128.42) (   0.36,-130.28)  211.00                80
 01/21/2020   09:48:39   (  -0.04,-128.42) (  -0.65,-125.74)  305.47                80