Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/07/2021   09:54:29   (  -0.14,-128.32) (  -0.79,-125.32)  341.07                80
 03/08/2021   22:16:07   (   0.13,-128.37) (  -0.38,-130.53)  247.24                80
 03/09/2021   21:59:50   (   0.13,-128.38) (   0.69,-125.96)  276.88                80
 03/11/2021   10:21:18   (  -0.11,-128.37) (   0.50,-131.13)  314.95                80
 03/12/2021   09:59:40   (  -0.12,-128.37) (  -0.51,-126.54)  208.44                80
 03/13/2021   22:21:17   (   0.11,-128.42) (  -0.65,-131.76)  380.90                80
 03/14/2021   22:05:00   (   0.12,-128.43) (   0.37,-127.17)  143.07                80
 03/16/2021   10:26:28   (  -0.10,-128.42) (   0.77,-132.35)  448.23                80
 03/17/2021   10:04:51   (  -0.11,-128.42) (  -0.24,-127.76)   74.72                80
 03/19/2021   22:10:11   (   0.10,-128.46) (   0.12,-128.40)    6.91                80