Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 6 3.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 06/05/2021   01:41:35   ( -71.15, -27.81) 06/05/2021   01:42:40  ( -71.14, -27.78)    1.60                65
 06/05/2021   02:32:19   (  71.04, 139.69) 06/05/2021   02:32:07  (  71.05, 139.72)    1.20                12
 06/05/2021   03:22:53   ( -70.58, -52.22) 06/05/2021   03:21:42  ( -70.66, -53.25)   38.82                71
 06/07/2021   17:57:57   ( -71.30,  87.87) 06/07/2021   17:59:08  ( -71.26,  88.29)   15.71                71
 06/07/2021   18:48:38   (  71.04,-104.37) 06/07/2021   18:48:37  (  71.06,-104.39)    2.05                 1
 06/07/2021   19:39:19   ( -70.94,  63.12) 06/07/2021   19:38:07  ( -70.94,  63.07)    2.02                72
 06/10/2021   10:14:23   ( -71.66,-156.83) 06/10/2021   10:15:33  ( -71.54,-155.37)   52.84                70
 06/10/2021   11:04:58   (  71.09,  11.48) 06/10/2021   11:05:07  (  71.06,  11.50)    3.32                 9
 06/10/2021   11:55:39   ( -70.99, 178.98) 06/10/2021   11:54:36  ( -71.00, 179.05)    3.04                63
 06/13/2021   03:21:17   (  71.09, 127.42) 06/13/2021   03:21:36  (  71.12, 127.47)    3.33                19
 06/13/2021   04:11:58   ( -70.98, -65.07) 06/13/2021   04:11:06  ( -71.01, -65.07)    2.93                52
 06/15/2021   19:37:35   (  71.10,-116.64) 06/15/2021   19:38:05  (  71.12,-116.65)    2.25                30
 06/15/2021   20:28:17   ( -71.03,  50.79) 06/15/2021   20:27:35  ( -71.01,  50.81)    2.75                42