Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/11/2021   21:50:00   (  -0.43,-127.65) (   0.30,-124.26)  385.78                80
 02/13/2021   10:14:09   (   0.45,-127.68) (   0.84,-129.45)  200.93                80
 02/14/2021   09:52:31   (   0.44,-127.72) (  -0.17,-124.86)  325.77                80
 02/15/2021   22:16:49   (  -0.46,-127.81) (  -0.95,-130.08)  258.33                80
 02/16/2021   21:55:12   (  -0.45,-127.85) (   0.06,-125.49)  268.32                80
 02/18/2021   10:19:20   (   0.47,-127.88) (   1.08,-130.68)  318.97                80
 02/19/2021   09:57:43   (   0.47,-127.91) (   0.07,-126.09)  207.26                80
 02/20/2021   22:22:00   (  -0.49,-127.99) (  -1.25,-131.31)  378.07                80
 02/21/2021   22:00:24   (  -0.48,-128.02) (  -0.17,-126.73)  147.92                80
 02/23/2021   10:24:31   (   0.50,-128.04) (   1.37,-131.90)  440.55                80
 02/24/2021   10:02:55   (   0.49,-128.06) (   0.30,-127.32)   85.00                80