Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 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)
 01/06/2019   10:11:57   (  -0.05,-128.46) (   0.72,-131.97)  399.37                80
 01/07/2019   09:55:51   (  -0.05,-128.44) (  -0.26,-127.43)  114.78                80
 01/09/2019   21:59:02   (   0.05,-128.28) (   0.08,-128.20)    9.20                80
 01/12/2019   09:59:25   (  -0.06,-128.32) (   0.07,-128.94)   70.98                80
 01/13/2019   09:43:20   (  -0.05,-128.29) (  -0.91,-124.40)  442.65                80
 01/14/2019   22:02:35   (   0.06,-128.14) (  -0.30,-129.70)  177.87                80
 01/15/2019   21:46:30   (   0.05,-128.11) (   0.74,-125.17)  335.44                80
 01/17/2019   10:05:38   (  -0.06,-128.16) (   0.45,-130.44)  259.64                80
 01/18/2019   09:49:32   (  -0.05,-128.13) (  -0.53,-125.90)  253.15                80