Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 3 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/15/2020   22:03:09   (   0.32,-128.32) (   0.34,-128.12)   22.93                80
 03/18/2020   10:05:44   (  -0.31,-128.24) (  -0.20,-128.74)   56.09                80
 03/19/2020   09:44:08   (  -0.32,-128.22) (  -1.24,-124.16)  463.21                80
 03/20/2020   22:05:47   (   0.30,-128.22) (   0.04,-129.38)  132.58                80
 03/21/2020   21:49:31   (   0.30,-128.20) (   1.08,-124.81)  386.99                80
 03/23/2020   10:11:01   (  -0.29,-128.14) (   0.11,-130.00)  211.50                80
 03/24/2020   09:49:26   (  -0.30,-128.12) (  -0.93,-125.43)  307.49                80
 03/25/2020   22:13:44   (   0.28,-128.11) (  -0.27,-130.65)  289.23                80
 03/26/2020   21:54:48   (   0.29,-128.09) (   0.72,-126.07)  229.88                80
 03/28/2020   10:16:18   (  -0.27,-128.03) (   0.48,-131.26)  368.96                80