Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 1 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/30/2021   22:20:13   (  -0.39,-127.62) (  -1.16,-130.99)  384.58                80
 01/31/2021   21:58:36   (  -0.37,-127.58) (  -0.10,-126.41)  133.75                80
 02/02/2021   10:22:43   (   0.40,-127.47) (   1.31,-131.58)  468.30                80
 02/03/2021   10:01:06   (   0.38,-127.43) (   0.30,-126.99)   49.66                80
 02/05/2021   22:06:26   (  -0.41,-127.38) (  -0.48,-127.62)   27.55                80
 02/06/2021   21:44:49   (  -0.39,-127.34) (   0.59,-123.04)  490.13                80
 02/08/2021   10:08:56   (   0.43,-127.21) (   0.68,-128.20)  113.23                80
 02/09/2021   09:47:19   (   0.41,-127.16) (  -0.39,-123.62)  404.02                80
 02/10/2021   22:11:36   (  -0.44,-127.14) (  -0.79,-128.84)  192.08                80
 02/11/2021   21:49:59   (  -0.43,-127.10) (   0.22,-124.25)  325.34                80
 02/13/2021   10:14:06   (   0.46,-126.97) (   0.99,-129.42)  278.01                80