Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 25.  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)
 01/26/2020   01:41:58   ( -70.82, -29.26) 01/26/2020   01:43:09  ( -70.71, -28.47)   31.16                71
 01/26/2020   02:32:36   (  70.39, 138.75) 01/26/2020   02:32:40  (  70.39, 138.69)    2.17                 4
 01/26/2020   03:23:17   ( -70.29, -53.78) 01/26/2020   03:22:10  ( -70.28, -53.84)    2.48                67
 01/28/2020   17:58:25   ( -70.92,  86.47) 01/28/2020   17:59:35  ( -70.84,  87.59)   42.17                70
 01/28/2020   18:49:01   (  70.39,-105.36) 01/28/2020   18:49:08  (  70.40,-105.42)    2.20                 7
 01/28/2020   19:39:42   ( -70.29,  62.12) 01/28/2020   19:38:38  ( -70.29,  62.06)    2.21                64
 01/31/2020   10:14:52   ( -71.03,-157.81) 01/31/2020   10:16:02  ( -70.90,-156.43)   52.04                70
 01/31/2020   11:05:26   (  70.40,  10.53) 01/31/2020   11:05:36  (  70.41,  10.48)    2.29                10
 01/31/2020   11:56:07   ( -70.29, 178.02) 01/31/2020   11:55:06  ( -70.30, 177.96)    2.75                61
 02/03/2020   02:31:19   ( -71.13, -42.09) 02/03/2020   02:32:28  ( -71.01, -40.37)   63.26                69
 02/03/2020   03:21:51   (  70.41, 126.42) 02/03/2020   03:22:04  (  70.41, 126.36)    2.36                13
 02/03/2020   04:12:32   ( -70.29, -66.08) 02/03/2020   04:11:34  ( -70.31, -66.15)    3.41                58
 02/05/2020   18:47:45   ( -71.24,  73.64) 02/05/2020   18:48:53  ( -71.12,  75.68)   74.59                68
 02/05/2020   19:38:15   (  70.41,-117.69) 02/05/2020   19:38:31  (  70.41,-117.76)    2.59                16
 02/05/2020   20:28:57   ( -70.34,  49.74) 02/05/2020   20:28:00  ( -70.37,  49.81)    3.49                57