Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2019   21:55:34   (  -0.06,-127.62) (  -0.12,-128.00)   42.31                80
 04/16/2019   21:39:30   (  -0.07,-127.58) (   0.86,-123.46)  469.79                80
 04/18/2019   09:58:38   (   0.06,-127.54) (   0.34,-128.73)  136.07                80
 04/19/2019   09:42:34   (   0.06,-127.50) (  -0.64,-124.20)  375.84                80
 04/20/2019   22:01:51   (  -0.06,-127.42) (  -0.56,-129.50)  237.43                80
 04/21/2019   21:45:48   (  -0.06,-127.38) (   0.49,-124.98)  274.17                80
 04/23/2019   10:04:56   (   0.06,-127.33) (   0.71,-130.25)  332.68                80
 04/24/2019   09:48:51   (   0.06,-127.28) (  -0.27,-125.71)  178.73                80
 04/25/2019   22:08:09   (  -0.06,-127.20) (  -0.92,-131.02)  435.15                80
 04/26/2019   21:52:04   (  -0.06,-127.15) (   0.06,-126.48)   76.06                80