Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 5 31.  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   ( -71.12,-143.69) 06/02/2021   09:26:11  ( -71.11,-143.70)    0.45                55
 06/02/2021   10:16:00   (  71.00,  23.81) 06/02/2021   10:15:38  (  71.02,  23.80)    1.86                22
 06/02/2021   11:06:27   ( -70.18,-167.53) 06/02/2021   11:05:20  ( -70.25,-169.73)   83.44                67
 06/05/2021   01:41:35   ( -71.11, -27.74) 06/05/2021   01:42:41  ( -71.13, -27.79)    2.88                66
 06/05/2021   02:32:20   (  71.05, 139.66) 06/05/2021   02:32:08  (  71.03, 139.70)    2.69                12
 06/05/2021   03:22:53   ( -70.59, -52.24) 06/05/2021   03:21:42  ( -70.65, -53.26)   38.11                71
 06/07/2021   17:57:57   ( -71.31,  87.84) 06/07/2021   17:59:08  ( -71.25,  88.28)   17.04                71
 06/07/2021   18:48:38   (  71.06,-104.40) 06/07/2021   18:48:37  (  71.04,-104.41)    1.66                 1
 06/07/2021   19:39:19   ( -70.95,  63.10) 06/07/2021   19:38:07  ( -70.93,  63.05)    3.07                72
 06/10/2021   10:14:23   ( -71.67,-156.86) 06/10/2021   10:15:32  ( -71.58,-155.30)   55.76                69
 06/10/2021   11:04:57   (  71.06,  11.54) 06/10/2021   11:05:07  (  71.05,  11.48)    2.62                10
 06/10/2021   11:55:39   ( -71.00, 178.95) 06/10/2021   11:54:36  ( -70.99, 179.03)    3.09                63
 06/13/2021   03:21:17   (  71.12, 127.38) 06/13/2021   03:21:36  (  71.10, 127.44)    3.04                19
 06/13/2021   04:11:58   ( -71.01, -65.11) 06/13/2021   04:11:06  ( -70.99, -65.09)    1.41                52