Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/10/2021   22:17:54   (  -0.27,-128.02) (  -0.59,-129.38)  155.12                80
 10/11/2021   22:01:35   (  -0.28,-128.05) (   0.43,-124.78)  371.55                80
 10/13/2021   10:20:23   (   0.25,-128.11) (   0.67,-129.96)  211.86                80
 10/14/2021   10:04:04   (   0.26,-128.13) (  -0.35,-125.37)  314.59                80
 10/15/2021   22:23:00   (  -0.23,-128.15) (  -0.78,-130.58)  277.76                80
 10/16/2021   22:06:42   (  -0.24,-128.18) (   0.23,-125.99)  248.79                80
 10/18/2021   10:25:29   (   0.21,-128.24) (   0.86,-131.17)  334.53                80
 10/19/2021   10:09:11   (   0.23,-128.26) (  -0.16,-126.58)  192.02                80
 10/20/2021   22:28:07   (  -0.20,-128.28) (  -0.97,-131.79)  400.49                80
 10/21/2021   22:11:49   (  -0.21,-128.30) (   0.05,-127.20)  125.83                80
 10/23/2021   10:30:35   (   0.19,-128.35) (   1.10,-132.37)  458.31                80