Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/20/2019   21:52:42   (   0.05,-127.94) (   0.34,-126.67)  145.26                80
 01/22/2019   10:11:50   (  -0.06,-127.98) (   0.84,-131.93)  450.75                80
 01/23/2019   09:55:45   (  -0.05,-127.94) (  -0.20,-127.41)   61.73                80
 01/25/2019   21:56:15   (   0.06,-127.75) (  -0.02,-128.17)   47.81                80
 01/26/2019   21:40:10   (   0.06,-127.71) (   0.96,-123.63)  464.50                80
 01/28/2019   09:59:17   (  -0.06,-127.74) (   0.22,-128.90)  131.91                80
 01/29/2019   09:43:13   (  -0.05,-127.70) (  -0.82,-124.37)  380.23                80
 01/30/2019   22:02:27   (   0.05,-127.54) (  -0.44,-129.66)  242.08                80
 01/31/2019   21:46:21   (   0.05,-127.49) (   0.55,-125.12)  269.75                80
 02/02/2019   10:05:30   (  -0.05,-127.52) (   0.58,-130.40)  327.55                80