Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/16/2021   22:06:42   (  -0.24,-128.17) (   0.24,-125.99)  248.48                80
 10/18/2021   10:25:29   (   0.21,-128.22) (   0.85,-131.17)  335.55                80
 10/19/2021   10:09:11   (   0.23,-128.24) (  -0.17,-126.58)  190.68                80
 10/20/2021   22:28:06   (  -0.20,-128.26) (  -1.02,-131.78)  402.16                80
 10/21/2021   22:11:48   (  -0.21,-128.28) (   0.00,-127.18)  123.88                80
 10/23/2021   10:30:35   (   0.18,-128.32) (   1.09,-132.37)  460.91                80
 10/24/2021   10:14:16   (   0.20,-128.34) (   0.06,-127.77)   64.61                80
 10/26/2021   22:14:13   (  -0.19,-128.35) (  -0.22,-128.38)    5.37                80
 10/29/2021   10:16:42   (   0.17,-128.40) (   0.28,-128.97)   65.54                80