Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2021   10:03:24   (  -0.13,-127.79) (  -0.54,-125.85)  220.61                80
 07/28/2021   22:22:20   (   0.15,-127.73) (  -0.60,-131.07)  380.14                80
 07/29/2021   22:06:03   (   0.14,-127.76) (   0.45,-126.48)  146.86                80
 07/31/2021   10:24:51   (  -0.16,-127.92) (   0.65,-131.67)  426.23                80
 08/01/2021   10:08:33   (  -0.15,-127.95) (  -0.34,-127.07)  100.44                80
 08/03/2021   22:11:11   (   0.17,-127.91) (   0.20,-127.69)   25.07                80
 08/06/2021   10:11:02   (  -0.18,-128.08) (  -0.14,-128.29)   23.65                80
 08/08/2021   22:13:39   (   0.20,-128.03) (   0.02,-128.91)  100.54                80
 08/09/2021   21:57:21   (   0.19,-128.04) (   1.01,-124.31)  424.94                80