Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 1 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/28/2021   10:17:33   (   0.37,-127.66) (   0.99,-130.36)  309.02                80
 01/29/2021   09:55:56   (   0.35,-127.62) (  -0.08,-125.79)  209.22                80
 01/30/2021   22:20:13   (  -0.39,-127.61) (  -1.16,-130.99)  385.46                80
 01/31/2021   21:58:36   (  -0.37,-127.57) (  -0.10,-126.41)  132.66                80
 02/02/2021   10:22:43   (   0.40,-127.46) (   1.31,-131.58)  469.03                80
 02/03/2021   10:01:06   (   0.38,-127.42) (   0.30,-126.99)   48.72                80
 02/05/2021   22:06:26   (  -0.41,-127.36) (  -0.48,-127.62)   29.63                80
 02/06/2021   21:44:49   (  -0.39,-127.32) (   0.59,-123.04)  487.79                80
 02/08/2021   10:08:56   (   0.43,-127.19) (   0.68,-128.20)  115.22                80
 02/09/2021   09:47:19   (   0.41,-127.14) (  -0.38,-123.62)  401.84                80