Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/14/2019   21:55:28   (  -0.06,-128.36) (   0.43,-126.20)  246.17                80
 05/16/2019   10:14:20   (   0.04,-128.38) (   0.71,-131.41)  345.31                80
 05/17/2019   09:58:05   (   0.05,-128.39) (  -0.32,-126.85)  177.04                80
 05/18/2019   22:17:07   (  -0.03,-128.41) (  -0.84,-132.09)  419.51                80
 05/19/2019   22:00:51   (  -0.04,-128.42) (   0.14,-127.51)  102.78                80
 05/21/2019   10:19:44   (   0.02,-128.44) (   1.00,-132.73)  489.18                80
 05/22/2019   10:03:29   (   0.03,-128.45) (  -0.04,-128.16)   32.65                80
 05/24/2019   22:03:35   (  -0.03,-128.46) (  -0.14,-128.83)   43.18                80
 05/25/2019   21:47:20   (  -0.04,-128.46) (   0.90,-124.26)  478.78                80
 05/27/2019   10:06:13   (   0.02,-128.48) (   0.23,-129.48)  113.63                80