Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 9 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/24/2021   22:21:32   (  -0.35,-127.74) (  -0.94,-130.36)  299.39                80
 09/25/2021   22:05:14   (  -0.36,-127.70) (   0.07,-125.77)  220.23                80
 09/27/2021   10:24:01   (   0.33,-127.67) (   1.07,-130.95)  372.88                80
 09/28/2021   10:07:43   (   0.34,-127.64) (   0.06,-126.35)  146.45                80
 09/29/2021   22:26:38   (  -0.32,-127.54) (  -1.23,-131.55)  457.56                80
 09/30/2021   22:10:19   (  -0.32,-127.50) (  -0.22,-126.96)   61.30                80
 10/03/2021   10:10:08   (   0.31,-127.42) (   0.33,-127.54)   14.33                80
 10/05/2021   22:12:45   (  -0.29,-127.27) (  -0.50,-128.15)  100.28                80
 10/06/2021   21:56:27   (  -0.30,-127.23) (   0.52,-123.56)  418.15                80