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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/02/2021   10:22:43   (   0.40,-127.47) (   1.34,-131.58)  468.38                80
 02/03/2021   10:01:07   (   0.38,-127.43) (   0.27,-127.00)   49.67                80
 02/05/2021   22:06:26   (  -0.41,-127.39) (  -0.45,-127.62)   26.67                80
 02/06/2021   21:44:49   (  -0.39,-127.34) (   0.55,-123.03)  491.02                80
 02/08/2021   10:08:56   (   0.43,-127.21) (   0.65,-128.20)  112.72                80
 02/09/2021   09:47:20   (   0.41,-127.17) (  -0.41,-123.63)  404.59                80
 02/10/2021   22:11:36   (  -0.44,-127.16) (  -0.83,-128.83)  190.80                80
 02/11/2021   21:50:00   (  -0.43,-127.11) (   0.23,-124.25)  326.68                80
 02/13/2021   10:14:07   (   0.46,-126.98) (   0.98,-129.42)  277.12                80
 02/14/2021   09:52:29   (   0.44,-126.94) (  -0.03,-124.83)  240.13                80
 02/15/2021   22:16:47   (  -0.47,-126.92) (  -1.15,-130.05)  355.85                80