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   22:20:12   (  -0.39,-127.62) (  -1.17,-130.99)  384.74                80
 01/31/2021   21:58:36   (  -0.37,-127.58) (  -0.11,-126.41)  133.54                80
 02/02/2021   10:22:43   (   0.40,-127.47) (   1.32,-131.58)  468.37                80
 02/03/2021   10:01:06   (   0.38,-127.43) (   0.31,-126.99)   49.59                80
 02/05/2021   22:06:26   (  -0.41,-127.38) (  -0.49,-127.61)   28.09                80
 02/06/2021   21:44:49   (  -0.39,-127.33) (   0.58,-123.04)  489.61                80
 02/08/2021   10:08:56   (   0.43,-127.21) (   0.63,-128.21)  113.59                80
 02/09/2021   09:47:19   (   0.41,-127.16) (  -0.38,-123.62)  403.59                80
 02/10/2021   22:11:36   (  -0.44,-127.14) (  -0.80,-128.83)  192.78                80
 02/11/2021   21:49:59   (  -0.43,-127.09) (   0.21,-124.24)  324.57                80