Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 26.  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)
 01/28/2020   17:58:25   ( -70.94,  86.45) 01/28/2020   17:59:35  ( -70.82,  87.57)   43.00                70
 01/28/2020   18:49:01   (  70.41,-105.38) 01/28/2020   18:49:08  (  70.39,-105.43)    2.51                 7
 01/28/2020   19:39:42   ( -70.30,  62.10) 01/28/2020   19:38:38  ( -70.28,  62.04)    3.31                64
 01/31/2020   10:14:52   ( -71.04,-157.83) 01/31/2020   10:16:01  ( -70.94,-156.36)   54.37                69
 01/31/2020   11:05:26   (  70.41,  10.51) 01/31/2020   11:05:36  (  70.40,  10.46)    2.37                10
 01/31/2020   11:56:07   ( -70.31, 178.00) 01/31/2020   11:55:06  ( -70.29, 177.94)    2.68                61
 02/03/2020   02:31:19   ( -71.15, -42.11) 02/03/2020   02:32:27  ( -71.06, -40.30)   65.98                68
 02/03/2020   03:21:51   (  70.42, 126.40) 02/03/2020   03:22:04  (  70.40, 126.35)    2.62                13
 02/03/2020   04:12:32   ( -70.31, -66.10) 02/03/2020   04:11:34  ( -70.30, -66.17)    2.63                58
 02/05/2020   18:47:46   ( -71.25,  73.61) 02/05/2020   18:48:53  ( -71.17,  75.76)   77.63                67
 02/05/2020   19:38:16   (  70.43,-117.71) 02/05/2020   19:38:32  (  70.41,-117.77)    3.29                16
 02/05/2020   20:28:57   ( -70.31,  49.79) 02/05/2020   20:28:02  ( -70.30,  49.72)    2.96                55
 02/08/2020   11:04:12   ( -71.36,-170.68) 02/08/2020   11:05:18  ( -71.28,-168.19)   89.23                66
 02/08/2020   11:54:40   (  70.44,  -1.83) 02/08/2020   11:54:58  (  70.46,  -1.81)    2.43                18
 02/08/2020   12:45:22   ( -70.36, 165.61) 02/08/2020   12:44:28  ( -70.36, 165.68)    2.78                54