Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 6 1.  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)
 06/02/2021   09:25:15   ( -71.10,-143.66) 06/02/2021   09:26:10  ( -71.13,-143.67)    3.31                55
 06/02/2021   10:16:00   (  71.04,  23.75) 06/02/2021   10:15:37  (  71.04,  23.82)    2.68                23
 06/02/2021   11:06:27   ( -70.22,-167.58) 06/02/2021   11:05:19  ( -70.27,-169.71)   80.08                68
 06/05/2021   01:41:35   ( -71.15, -27.80) 06/05/2021   01:42:40  ( -71.15, -27.77)    1.32                65
 06/05/2021   02:32:19   (  71.04, 139.69) 06/05/2021   02:32:07  (  71.05, 139.72)    1.81                12
 06/05/2021   03:22:53   ( -70.58, -52.22) 06/05/2021   03:21:42  ( -70.66, -53.24)   38.80                71
 06/07/2021   17:57:57   ( -71.30,  87.87) 06/07/2021   17:59:09  ( -71.21,  88.22)   15.76                72
 06/07/2021   18:48:38   (  71.04,-104.37) 06/07/2021   18:48:37  (  71.06,-104.38)    2.16                 1
 06/07/2021   19:39:19   ( -70.94,  63.12) 06/07/2021   19:38:07  ( -70.95,  63.08)    1.82                72
 06/10/2021   10:14:23   ( -71.66,-156.84) 06/10/2021   10:15:33  ( -71.54,-155.36)   53.37                70
 06/10/2021   11:04:57   (  71.04,  11.56) 06/10/2021   11:05:07  (  71.06,  11.51)    2.97                10
 06/10/2021   11:55:39   ( -70.99, 178.97) 06/10/2021   11:54:36  ( -71.01, 179.05)    3.47                63
 06/13/2021   03:21:16   (  71.10, 127.40) 06/13/2021   03:21:35  (  71.12, 127.47)    3.00                19
 06/13/2021   04:11:57   ( -70.99, -65.09) 06/13/2021   04:11:05  ( -71.01, -65.06)    2.30                52