Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 6 2.  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   09:25:16   ( -71.14,-143.73) 06/02/2021   09:26:10  ( -71.14,-143.66)    2.64                54
 06/02/2021   10:16:00   (  71.03,  23.77) 06/02/2021   10:15:37  (  71.05,  23.84)    3.49                23
 06/02/2021   11:06:27   ( -70.20,-167.56) 06/02/2021   11:05:19  ( -70.28,-169.69)   80.50                68
 06/05/2021   01:41:35   ( -71.13, -27.78) 06/05/2021   01:42:40  ( -71.16, -27.75)    2.67                65
 06/05/2021   02:32:19   (  71.02, 139.72) 06/05/2021   02:32:08  (  71.01, 139.66)    2.92                11
 06/05/2021   03:22:54   ( -70.62, -52.28) 06/05/2021   03:21:42  ( -70.67, -53.22)   35.38                72
 06/07/2021   17:57:57   ( -71.28,  87.90) 06/07/2021   17:59:09  ( -71.22,  88.23)   13.64                72
 06/07/2021   18:48:39   (  71.07,-104.43) 06/07/2021   18:48:37  (  71.07,-104.37)    2.33                 2
 06/07/2021   19:39:20   ( -70.97,  63.06) 06/07/2021   19:38:07  ( -70.96,  63.09)    2.22                73
 06/10/2021   10:14:23   ( -71.69,-156.89) 06/10/2021   10:15:32  ( -71.55,-155.35)   56.30                69
 06/10/2021   11:04:57   (  71.07,  11.51) 06/10/2021   11:05:06  (  71.07,  11.52)    0.35                 9
 06/10/2021   11:55:38   ( -70.97, 179.01) 06/10/2021   11:54:36  ( -70.96, 178.98)    1.32                62
 06/13/2021   02:30:49   ( -72.04, -41.62) 06/13/2021   02:31:55  ( -71.93, -38.82)   96.99                66
 06/13/2021   03:21:16   (  71.08, 127.45) 06/13/2021   03:21:36  (  71.07, 127.40)    1.84                20
 06/13/2021   04:11:58   ( -71.02, -65.13) 06/13/2021   04:11:05  ( -71.02, -65.05)    2.90                53
 06/15/2021   19:37:36   (  71.13,-116.70) 06/15/2021   19:38:05  (  71.12,-116.64)    2.56                29
 06/15/2021   20:28:17   ( -71.02,  50.81) 06/15/2021   20:27:35  ( -71.02,  50.83)    0.44                42