Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/12/2019   09:52:41   (   0.06,-128.32) (  -0.56,-125.52)  318.70                80
 05/13/2019   22:11:42   (  -0.05,-128.34) (  -0.60,-130.77)  276.83                80
 05/14/2019   21:55:28   (  -0.06,-128.36) (   0.43,-126.20)  245.91                80
 05/16/2019   10:14:20   (   0.04,-128.38) (   0.72,-131.41)  345.43                80
 05/17/2019   09:58:06   (   0.05,-128.39) (  -0.32,-126.85)  176.89                80
 05/18/2019   22:17:07   (  -0.03,-128.41) (  -0.85,-132.09)  419.86                80
 05/19/2019   22:00:52   (  -0.04,-128.42) (   0.19,-127.53)  102.38                80
 05/21/2019   10:19:45   (   0.02,-128.44) (   0.95,-132.74)  489.51                80
 05/22/2019   10:03:29   (   0.03,-128.44) (  -0.02,-128.16)   32.30                80
 05/24/2019   22:03:36   (  -0.03,-128.45) (  -0.10,-128.84)   43.68                80
 05/25/2019   21:47:21   (  -0.04,-128.46) (   0.88,-124.26)  478.14                80