Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2019   10:11:18   (  -0.04,-128.14) (   0.79,-131.83)  420.81                80
 12/25/2019   09:55:13   (  -0.03,-128.17) (  -0.21,-127.30)   98.90                80
 12/27/2019   21:58:24   (   0.03,-128.19) (   0.08,-128.07)   14.52                80
 12/30/2019   09:58:45   (  -0.03,-128.28) (   0.10,-128.80)   59.65                80
 12/31/2019   09:42:40   (  -0.03,-128.31) (  -0.96,-124.28)  459.66                80
 01/01/2020   22:01:55   (   0.04,-128.31) (  -0.22,-129.58)  144.74                80
 01/02/2020   21:45:50   (   0.04,-128.33) (   0.78,-125.05)  374.25                80
 01/04/2020   10:04:56   (  -0.04,-128.39) (   0.42,-130.31)  219.64                80
 01/05/2020   09:48:52   (  -0.04,-128.41) (  -0.65,-125.79)  299.23                80