Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 5.  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) (  -0.48,-127.62)   26.32                80
 02/06/2021   21:44:49   (  -0.39,-127.35) (   0.59,-123.04)  491.49                80
 02/08/2021   10:08:56   (   0.43,-127.21) (   0.68,-128.20)  112.82                80
 02/09/2021   09:47:19   (   0.41,-127.17) (  -0.39,-123.62)  404.57                80
 02/10/2021   22:11:36   (  -0.44,-127.16) (  -0.79,-128.83)  190.17                80
 02/11/2021   21:49:59   (  -0.43,-127.12) (   0.22,-124.24)  327.35                80
 02/13/2021   10:14:06   (   0.46,-126.98) (   0.98,-129.42)  276.96                80
 02/14/2021   09:52:29   (   0.44,-126.93) (  -0.03,-124.83)  240.33                80
 02/15/2021   22:16:46   (  -0.47,-126.92) (  -1.15,-130.04)  354.97                80
 02/16/2021   21:55:09   (  -0.45,-126.88) (  -0.14,-125.45)  162.42                80
 02/18/2021   10:19:16   (   0.48,-126.74) (   1.34,-130.62)  442.22                80