Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2019   10:08:56   (   0.05,-128.30) (   0.44,-130.10)  203.99                80
 05/12/2019   09:52:41   (   0.06,-128.32) (  -0.59,-125.53)  318.71                80
 05/13/2019   22:11:43   (  -0.05,-128.34) (  -0.57,-130.78)  276.91                80
 05/14/2019   21:55:27   (  -0.06,-128.36) (   0.40,-126.20)  245.83                80
 05/16/2019   10:14:20   (   0.04,-128.38) (   0.75,-131.41)  345.55                80
 05/17/2019   09:58:05   (   0.05,-128.39) (  -0.29,-126.84)  176.76                80
 05/18/2019   22:17:06   (  -0.03,-128.41) (  -0.88,-132.09)  420.04                80
 05/19/2019   22:00:52   (  -0.04,-128.42) (   0.15,-127.52)  102.14                80
 05/21/2019   10:19:44   (   0.02,-128.44) (   0.99,-132.73)  489.74                80
 05/22/2019   10:03:30   (   0.03,-128.44) (  -0.04,-128.16)   32.03                80
 05/24/2019   22:03:37   (  -0.03,-128.45) (  -0.09,-128.84)   44.07                80