Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2021   10:19:25   (   0.06,-128.40) (   0.28,-129.46)  121.05                80
 11/20/2021   10:03:44   (   0.07,-128.38) (  -0.66,-125.01)  383.84                80
 11/21/2021   22:23:41   (  -0.05,-128.36) (  -0.55,-130.47)  241.22                80
 11/22/2021   22:08:05   (  -0.06,-128.34) (   0.48,-126.06)  261.35                80
 11/24/2021   10:28:00   (   0.03,-128.32) (   0.73,-131.51)  362.98                80
 11/25/2021   10:12:27   (   0.04,-128.30) (  -0.22,-127.09)  137.07                80
 11/26/2021   22:32:39   (  -0.01,-128.27) (  -0.97,-132.62)  495.47                80
 11/27/2021   22:17:11   (  -0.02,-128.25) (   0.01,-128.23)    3.97                80
 11/28/2021   21:59:05   (  -0.04,-128.22) (   0.95,-123.84)  499.61                80
 11/30/2021   10:19:15   (   0.01,-128.19) (   0.27,-129.35)  132.72                80
 12/01/2021   10:03:53   (   0.02,-128.17) (  -0.70,-124.99)  361.89                80
 12/02/2021   22:24:20   (   0.00,-128.12) (  -0.57,-130.57)  279.36                80