Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 27.  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)
 12/27/2019   14:41:19   ( -70.47, 136.42) 12/27/2019   14:42:04  ( -70.46, 136.47)    2.70                45
 12/27/2019   15:32:03   (  70.36, -56.10) 12/27/2019   15:31:31  (  70.35, -56.04)    2.59                32
 12/30/2019   06:57:44   ( -70.46,-107.67) 12/30/2019   06:58:32  ( -70.47,-107.62)    2.15                48
 12/30/2019   07:48:28   (  70.35,  59.81) 12/30/2019   07:47:59  (  70.37,  59.87)    2.42                29
 01/01/2020   23:14:09   ( -70.46,   8.24) 01/01/2020   23:15:01  ( -70.43,   8.20)    3.07                52
 01/02/2020   00:04:53   (  70.35, 175.72) 01/02/2020   00:04:28  (  70.32, 175.69)    3.10                25
 01/02/2020   00:55:18   ( -69.40, -15.53) 01/02/2020   00:54:12  ( -69.45, -17.90)   92.55                66
 01/04/2020   15:30:33   ( -70.46, 124.14) 01/04/2020   15:31:28  ( -70.44, 124.10)    1.88                55
 01/04/2020   16:21:17   (  70.34, -68.37) 01/04/2020   16:20:55  (  70.33, -68.42)    2.23                22
 01/04/2020   17:11:45   ( -69.55, 100.14) 01/04/2020   17:10:37  ( -69.57,  98.15)   77.45                68
 01/07/2020   07:46:58   ( -70.45,-119.96) 01/07/2020   07:47:56  ( -70.45,-120.00)    1.80                58
 01/07/2020   08:37:42   (  70.34,  47.53) 01/07/2020   08:37:23  (  70.34,  47.47)    2.20                19
 01/07/2020   09:28:12   ( -69.66,-144.11) 01/07/2020   09:27:03  ( -69.69,-145.81)   65.71                69
 01/10/2020   00:03:23   ( -70.45,  -4.06) 01/10/2020   00:04:24  ( -70.46,  -4.12)    2.20                61
 01/10/2020   00:54:07   (  70.34, 163.42) 01/10/2020   00:53:51  (  70.34, 163.36)    2.57                16