Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 5 16.  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)
 05/17/2020   14:52:19   ( -70.90, 133.22) 05/17/2020   14:53:31  ( -70.80, 133.90)   26.65                72
 05/17/2020   15:42:58   (  70.52, -58.85) 05/17/2020   15:43:01  (  70.53, -58.86)    2.27                 3
 05/17/2020   16:33:39   ( -70.42, 108.63) 05/17/2020   16:32:31  ( -70.43, 108.62)    1.06                68
 05/20/2020   07:08:48   ( -71.17,-111.34) 05/20/2020   07:09:57  ( -71.10,-109.77)   56.84                69
 05/20/2020   07:59:22   (  70.53,  57.03) 05/20/2020   07:59:32  (  70.55,  57.04)    2.29                10
 05/20/2020   08:50:03   ( -70.44,-135.49) 05/20/2020   08:49:02  ( -70.45,-135.48)    1.83                61
 05/22/2020   23:25:18   ( -71.50,   4.00) 05/22/2020   23:26:24  ( -71.37,   6.54)   91.13                66
 05/23/2020   00:15:46   (  70.56, 172.91) 05/23/2020   00:16:04  (  70.56, 172.91)    0.25                18
 05/23/2020   01:06:27   ( -70.46, -19.61) 05/23/2020   01:05:34  ( -70.46, -19.60)    0.52                53
 05/25/2020   16:32:09   (  70.58, -71.22) 05/25/2020   16:32:35  (  70.60, -71.16)    3.02                26
 05/25/2020   17:22:50   ( -70.48,  96.27) 05/25/2020   17:22:06  ( -70.45,  96.25)    3.26                44
 05/28/2020   08:48:32   (  70.55,  44.73) 05/28/2020   08:49:09  (  70.57,  44.65)    3.13                37
 05/28/2020   09:39:14   ( -70.50,-147.86) 05/28/2020   09:38:39  ( -70.47,-147.85)    2.88                35