Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/11/2021   10:21:17   (  -0.11,-128.36) (   0.51,-131.13)  315.43                80
 03/12/2021   09:59:40   (  -0.12,-128.37) (  -0.50,-126.54)  207.75                80
 03/13/2021   22:21:17   (   0.11,-128.41) (  -0.66,-131.76)  381.70                80
 03/14/2021   22:05:01   (   0.11,-128.42) (   0.42,-127.18)  142.07                80
 03/16/2021   10:26:28   (  -0.10,-128.40) (   0.78,-132.35)  449.76                80
 03/17/2021   10:04:51   (  -0.11,-128.41) (  -0.23,-127.76)   72.99                80
 03/19/2021   22:10:10   (   0.10,-128.44) (   0.10,-128.39)    4.88                80
 03/22/2021   10:12:41   (  -0.09,-128.41) (   0.03,-128.98)   65.20                80
 03/23/2021   09:51:04   (  -0.09,-128.40) (  -0.98,-124.40)  456.59                80
 03/24/2021   22:12:40   (   0.08,-128.41) (  -0.20,-129.61)  136.23                80