Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/29/2021   10:16:42   (   0.17,-128.39) (   0.28,-128.97)   65.14                80
 10/30/2021   10:00:24   (   0.18,-128.40) (  -0.75,-124.38)  459.61                80
 10/31/2021   22:19:20   (  -0.15,-128.41) (  -0.38,-129.59)  133.78                80
 11/01/2021   22:03:01   (  -0.16,-128.42) (   0.58,-124.98)  390.92                80
 11/03/2021   10:21:48   (   0.13,-128.43) (   0.50,-130.17)  197.47                80
 11/04/2021   10:05:30   (   0.15,-128.43) (  -0.52,-125.57)  326.76                80
 11/05/2021   22:24:25   (  -0.12,-128.43) (  -0.66,-130.78)  267.87                80
 11/06/2021   22:08:06   (  -0.14,-128.43) (   0.37,-126.18)  255.87                80
 11/08/2021   10:26:53   (   0.10,-128.43) (   0.78,-131.35)  333.96                80
 11/09/2021   10:10:34   (   0.12,-128.42) (  -0.25,-126.76)  189.22                80
 11/10/2021   22:29:30   (  -0.09,-128.40) (  -0.87,-131.98)  406.78                80