Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 9 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/29/2021   22:26:38   (  -0.32,-127.55) (  -1.23,-131.55)  456.83                80
 09/30/2021   22:10:19   (  -0.32,-127.50) (  -0.22,-126.96)   62.03                80
 10/03/2021   10:10:08   (   0.31,-127.41) (   0.33,-127.54)   14.49                80
 10/05/2021   22:12:45   (  -0.29,-127.28) (  -0.50,-128.15)   99.61                80
 10/06/2021   21:56:27   (  -0.31,-127.23) (   0.51,-123.55)  418.82                80
 10/08/2021   10:15:13   (   0.28,-127.17) (   0.66,-128.72)  177.59                80
 10/09/2021   09:58:54   (   0.29,-127.12) (  -0.36,-124.13)  340.56                80
 10/10/2021   22:17:51   (  -0.27,-127.02) (  -0.77,-129.34)  264.53                80
 10/11/2021   22:01:32   (  -0.28,-126.96) (   0.25,-124.75)  252.89                80