Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 2 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)
 02/20/2020   10:14:25   (  -0.36,-128.41) (   0.32,-131.54)  356.85                80
 02/21/2020   09:58:08   (  -0.36,-128.42) (  -0.66,-126.96)  165.75                80
 02/22/2020   22:17:09   (   0.36,-128.45) (  -0.48,-132.20)  427.22                80
 02/23/2020   22:00:53   (   0.36,-128.46) (   0.56,-127.62)   95.39                80
 02/25/2020   10:22:24   (  -0.36,-128.44) (   0.60,-132.82)  498.32                80
 02/26/2020   10:00:47   (  -0.36,-128.45) (  -0.38,-128.23)   24.09                80
 02/28/2020   22:03:31   (   0.36,-128.48) (   0.24,-128.89)   47.68                80
 02/29/2020   21:47:15   (   0.36,-128.48) (   1.28,-124.32)  474.33                80
 03/02/2020   10:08:46   (  -0.35,-128.46) (  -0.10,-129.51)  120.43                80
 03/03/2020   09:47:10   (  -0.35,-128.45) (  -1.14,-124.94)  400.82                80