Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/19/2019   22:00:52   (  -0.04,-128.42) (   0.19,-127.52)  102.75                80
 05/21/2019   10:19:43   (   0.02,-128.43) (   1.01,-132.72)  490.10                80
 05/22/2019   10:03:29   (   0.03,-128.43) (  -0.03,-128.16)   31.55                80
 05/24/2019   22:03:36   (  -0.03,-128.45) (  -0.09,-128.84)   43.97                80
 05/25/2019   21:47:20   (  -0.04,-128.45) (   0.89,-124.26)  477.84                80
 05/27/2019   10:06:13   (   0.02,-128.46) (   0.24,-129.47)  115.40                80
 05/28/2019   09:49:57   (   0.03,-128.46) (  -0.74,-124.89)  405.90                80
 05/29/2019   22:08:58   (  -0.02,-128.46) (  -0.42,-130.14)  192.38                80
 05/30/2019   21:52:44   (  -0.02,-128.46) (   0.63,-125.58)  328.89                80
 06/01/2019   10:11:36   (   0.00,-128.46) (   0.50,-130.79)  264.87                80