Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 2 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)
 02/10/2019   21:56:09   (   0.05,-127.99) (  -0.01,-128.15)   19.40                80
 02/13/2019   10:01:52   (  -0.04,-128.13) (   0.13,-128.90)   87.85                80
 02/14/2019   09:40:26   (  -0.04,-128.15) (  -0.86,-124.36)  431.16                80
 02/15/2019   22:05:01   (   0.03,-128.10) (  -0.33,-129.66)  177.84                80
 02/16/2019   21:43:37   (   0.03,-128.12) (   0.72,-125.13)  340.79                80
 02/18/2019   10:08:04   (  -0.01,-128.22) (   0.45,-130.40)  248.24                80
 02/19/2019   09:46:39   (  -0.01,-128.24) (  -0.54,-125.87)  270.19                80
 02/20/2019   22:11:14   (   0.01,-128.18) (  -0.65,-131.16)  339.51                80
 02/21/2019   21:49:49   (   0.01,-128.20) (   0.34,-126.63)  178.62                80