Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/16/2021   10:26:27   (  -0.10,-128.40) (   0.81,-132.34)  450.02                80
 03/17/2021   10:04:51   (  -0.11,-128.40) (  -0.26,-127.77)   72.50                80
 03/19/2021   22:07:31   (   0.10,-128.42) (   0.13,-128.40)    4.53                80
 03/22/2021   10:12:41   (  -0.09,-128.39) (   0.07,-128.98)   66.72                80
 03/23/2021   09:51:04   (  -0.09,-128.39) (  -1.01,-124.40)  454.91                80
 03/24/2021   22:12:40   (   0.07,-128.39) (  -0.19,-129.61)  138.54                80
 03/25/2021   21:56:23   (   0.08,-128.38) (   0.83,-125.02)  383.48                80
 03/27/2021   10:17:51   (  -0.07,-128.36) (   0.33,-130.20)  209.40                80
 03/28/2021   09:56:14   (  -0.08,-128.34) (  -0.68,-125.61)  311.63                80
 03/29/2021   22:17:50   (   0.06,-128.33) (  -0.49,-130.82)  283.61                80