Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 4 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2018   18:26:29   (  -0.00, -75.17) (  -0.14, -75.70)   60.75                80
 04/24/2018   18:10:25   (  -0.00, -75.18) (   0.87, -71.17)  455.99                80
 04/26/2018   06:32:13   (   0.01, -75.19) (   0.30, -76.44)  143.21                80
 04/27/2018   06:10:49   (   0.00, -75.20) (  -0.72, -71.91)  373.83                80
 04/28/2018   18:32:45   (  -0.00, -75.20) (  -0.48, -77.21)  229.73                80
 04/29/2018   18:16:41   (  -0.00, -75.22) (   0.54, -72.68)  287.90                80
 05/01/2018   06:38:29   (   0.00, -75.24) (   0.63, -77.96)  309.93                80
 05/02/2018   06:17:04   (  -0.00, -75.25) (  -0.38, -73.43)  207.84                80
 05/03/2018   18:39:01   (   0.00, -75.27) (  -0.80, -78.73)  394.96                80
 05/04/2018   18:22:56   (   0.00, -75.29) (   0.21, -74.20)  123.30                80