Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/05/2021   22:06:26   (  -0.41,-127.39) (  -0.46,-127.62)   26.30                80
 02/06/2021   21:44:49   (  -0.39,-127.35) (   0.55,-123.03)  491.41                80
 02/08/2021   10:08:56   (   0.43,-127.21) (   0.65,-128.20)  112.68                80
 02/09/2021   09:47:19   (   0.41,-127.17) (  -0.35,-123.61)  404.68                80
 02/10/2021   22:11:36   (  -0.44,-127.16) (  -0.83,-128.83)  190.22                80
 02/11/2021   21:49:59   (  -0.43,-127.12) (   0.24,-124.25)  327.30                80
 02/13/2021   10:14:06   (   0.46,-126.98) (   1.02,-129.41)  276.83                80
 02/14/2021   09:52:29   (   0.44,-126.94) (  -0.05,-124.83)  240.46                80
 02/15/2021   22:16:45   (  -0.47,-126.92) (  -1.19,-130.03)  355.02                80
 02/16/2021   21:55:09   (  -0.45,-126.88) (  -0.12,-125.46)  162.38                80