Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 8 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)
 08/11/2021   10:16:09   (  -0.21,-128.16) (   0.07,-129.50)  152.01                80
 08/12/2021   09:59:51   (  -0.20,-128.18) (  -0.92,-124.90)  373.50                80
 08/13/2021   22:18:46   (   0.22,-128.11) (  -0.25,-130.11)  227.86                80
 08/14/2021   22:02:29   (   0.21,-128.13) (   0.81,-125.52)  297.02                80
 08/16/2021   10:21:17   (  -0.23,-128.24) (   0.32,-130.71)  281.50                80
 08/17/2021   10:04:58   (  -0.23,-128.25) (  -0.68,-126.11)  243.00                80
 08/18/2021   22:23:54   (   0.25,-128.17) (  -0.49,-131.32)  359.45                80
 08/19/2021   22:07:36   (   0.24,-128.17) (   0.57,-126.73)  164.53                80
 08/21/2021   10:26:25   (  -0.26,-128.27) (   0.56,-131.92)  415.32                80
 08/22/2021   10:10:07   (  -0.26,-128.28) (  -0.50,-127.33)  108.98                80
 08/23/2021   22:31:41   (   0.27,-128.21) (  -0.72,-132.53)  492.90                80
 08/24/2021   22:12:44   (   0.26,-128.21) (   0.34,-127.94)   31.13                80