Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2019   10:11:50   (  -0.06,-127.98) (   0.84,-131.93)  450.91                80
 01/23/2019   09:55:45   (  -0.05,-127.94) (  -0.20,-127.41)   61.64                80
 01/25/2019   21:56:15   (   0.06,-127.75) (  -0.02,-128.17)   47.33                80
 01/26/2019   21:40:10   (   0.06,-127.71) (   0.97,-123.63)  465.06                80
 01/28/2019   09:59:17   (  -0.06,-127.75) (   0.22,-128.90)  131.70                80
 01/29/2019   09:43:13   (  -0.05,-127.70) (  -0.82,-124.37)  380.49                80
 01/30/2019   22:02:27   (   0.05,-127.54) (  -0.43,-129.66)  241.30                80
 01/31/2019   21:46:21   (   0.05,-127.50) (   0.55,-125.12)  270.59                80
 02/02/2019   10:05:30   (  -0.05,-127.53) (   0.58,-130.40)  327.03                80
 02/03/2019   09:49:24   (  -0.04,-127.48) (  -0.41,-125.86)  184.64                80