Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 4 24.  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)
 04/25/2021   19:55:20   ( -71.09,  58.58) 04/25/2021   19:56:26  ( -71.07,  58.52)    3.53                66
 04/25/2021   20:46:04   (  71.01,-133.97) 04/25/2021   20:45:52  (  71.02,-133.91)    2.54                12
 04/25/2021   21:36:39   ( -70.57,  34.08) 04/25/2021   21:35:27  ( -70.63,  33.13)   35.76                72
 04/28/2021   12:11:41   ( -71.17, 174.39) 04/28/2021   12:12:52  ( -71.15, 174.52)    5.37                71
 04/28/2021   13:02:24   (  71.04, -18.08) 04/28/2021   13:02:19  (  71.05, -17.99)    3.24                 5
 04/28/2021   13:53:03   ( -70.81, 149.63) 04/28/2021   13:51:50  ( -70.88, 149.38)   12.19                73
 05/01/2021   04:28:04   ( -71.40, -70.09) 05/01/2021   04:29:16  ( -71.28, -69.39)   28.64                72
 05/01/2021   05:18:42   (  71.01,  97.90) 05/01/2021   05:18:46  (  71.01,  97.83)    2.49                 4
 05/01/2021   06:09:24   ( -70.94, -94.66) 05/01/2021   06:08:15  ( -70.96, -94.62)    2.16                69
 05/03/2021   20:44:29   ( -71.69,  45.32) 05/03/2021   20:45:38  ( -71.56,  46.96)   59.24                69
 05/03/2021   21:35:02   (  71.05,-146.22) 05/03/2021   21:35:13  (  71.02,-146.27)    3.00                11
 05/03/2021   22:25:44   ( -70.97,  21.22) 05/03/2021   22:24:42  ( -70.97,  21.28)    2.20                62
 05/06/2021   13:00:53   ( -71.94, 160.81) 05/06/2021   13:02:00  ( -71.84, 163.31)   87.19                67
 05/06/2021   13:51:22   (  71.08, -30.34) 05/06/2021   13:51:39  (  71.09, -30.29)    2.04                17
 05/06/2021   14:42:03   ( -70.96, 137.19) 05/06/2021   14:41:09  ( -70.98, 137.18)    2.67                54