Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/11/2020   22:14:17   (   0.05,-128.40) (  -0.88,-132.58)  475.94                80
 01/12/2020   21:58:12   (   0.04,-128.41) (   0.13,-128.04)   41.29                80
 01/15/2020   09:58:33   (  -0.05,-128.43) (   0.05,-128.77)   39.36                80
 01/16/2020   09:42:27   (  -0.04,-128.44) (  -0.96,-124.24)  477.80                80
 01/17/2020   22:01:43   (   0.05,-128.42) (  -0.21,-129.54)  128.21                80
 01/18/2020   21:45:37   (   0.04,-128.42) (   0.80,-125.01)  388.57                80
 01/20/2020   10:04:44   (  -0.04,-128.43) (   0.40,-130.27)  209.96                80
 01/21/2020   09:48:38   (  -0.04,-128.43) (  -0.62,-125.73)  306.64                80
 01/22/2020   22:07:53   (   0.04,-128.41) (  -0.55,-131.04)  299.93                80
 01/23/2020   21:51:48   (   0.03,-128.40) (   0.47,-126.50)  216.30                80