Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 1 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/26/2021   21:53:26   (  -0.33,-127.76) (   0.24,-125.20)  292.00                80
 01/28/2021   10:17:33   (   0.37,-127.65) (   0.98,-130.37)  309.04                80
 01/29/2021   09:55:56   (   0.35,-127.62) (  -0.08,-125.79)  209.19                80
 01/30/2021   22:20:13   (  -0.39,-127.61) (  -1.15,-130.99)  385.58                80
 01/31/2021   21:58:36   (  -0.37,-127.57) (  -0.09,-126.42)  132.55                80
 02/02/2021   10:22:44   (   0.40,-127.46) (   1.30,-131.58)  469.14                80
 02/03/2021   10:01:06   (   0.39,-127.42) (   0.29,-126.99)   48.58                80
 02/05/2021   22:06:26   (  -0.41,-127.36) (  -0.46,-127.62)   29.78                80
 02/06/2021   21:44:48   (  -0.39,-127.31) (   0.55,-123.03)  487.60                80
 02/08/2021   10:08:56   (   0.43,-127.19) (   0.66,-128.20)  115.34                80