Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/17/2021   10:04:51   (  -0.11,-128.40) (  -0.24,-127.76)   72.60                80
 03/19/2021   22:07:31   (   0.10,-128.42) (   0.11,-128.39)    3.64                80
 03/22/2021   10:12:41   (  -0.08,-128.39) (   0.03,-128.98)   66.70                80
 03/23/2021   09:51:04   (  -0.09,-128.38) (  -0.99,-124.39)  454.90                80
 03/24/2021   22:12:40   (   0.07,-128.39) (  -0.20,-129.60)  138.65                80
 03/25/2021   21:56:23   (   0.08,-128.38) (   0.81,-125.01)  383.35                80
 03/27/2021   10:17:51   (  -0.06,-128.36) (   0.35,-130.19)  209.46                80
 03/28/2021   09:56:14   (  -0.07,-128.34) (  -0.66,-125.60)  311.55                80
 03/29/2021   22:17:50   (   0.06,-128.33) (  -0.52,-130.82)  283.83                80
 03/30/2021   22:01:33   (   0.07,-128.32) (   0.56,-126.24)  237.55                80