Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 4 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/26/2020   22:07:36   (   0.15,-128.16) (  -0.05,-129.08)  104.44                80
 04/27/2020   21:46:01   (   0.16,-128.18) (   1.00,-124.51)  418.83                80
 04/29/2020   10:10:11   (  -0.13,-128.21) (   0.18,-129.70)  169.52                80
 04/30/2020   09:48:34   (  -0.15,-128.21) (  -0.81,-125.11)  353.02                80
 05/01/2020   22:12:53   (   0.12,-128.22) (  -0.37,-130.34)  241.78                80
 05/02/2020   21:51:17   (   0.13,-128.23) (   0.68,-125.76)  280.88                80
 05/04/2020   10:15:27   (  -0.10,-128.26) (   0.50,-130.96)  307.67                80
 05/05/2020   09:53:52   (  -0.12,-128.26) (  -0.56,-126.38)  214.37                80
 05/06/2020   22:18:09   (   0.09,-128.25) (  -0.69,-131.60)  381.76                80
 05/07/2020   21:56:34   (   0.11,-128.26) (   0.37,-127.02)  140.30                80
 05/09/2020   10:20:44   (  -0.08,-128.28) (   0.80,-132.22)  448.75                80