Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 10.  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)
 07/10/2020   06:01:27   ( -70.60, -93.45) 07/10/2020   06:02:29  ( -70.60, -93.49)    1.58                62
 07/10/2020   06:52:10   (  70.48,  74.05) 07/10/2020   06:51:56  (  70.50,  74.01)    2.41                14
 07/10/2020   07:42:43   ( -69.92,-117.75) 07/10/2020   07:41:33  ( -70.00,-119.08)   51.61                70
 07/12/2020   22:17:51   ( -70.64,  22.41) 07/12/2020   22:18:59  ( -70.61,  22.41)    3.22                68
 07/12/2020   23:08:33   (  70.52,-170.10) 07/12/2020   23:08:25  (  70.51,-170.10)    1.79                 8
 07/12/2020   23:59:10   ( -70.16,  -2.21) 07/12/2020   23:57:58  ( -70.23,  -2.87)   26.13                72
 07/15/2020   14:34:15   ( -70.72, 138.18) 07/15/2020   14:35:27  ( -70.67, 138.38)    9.46                72
 07/15/2020   15:24:56   (  70.51, -54.16) 07/15/2020   15:24:55  (  70.51, -54.21)    1.89                 1
 07/15/2020   16:15:38   ( -70.40, 113.32) 07/15/2020   16:14:25  ( -70.40, 113.26)    2.36                73
 07/18/2020   06:50:43   ( -70.96,-106.31) 07/18/2020   06:51:54  ( -70.83,-105.49)   33.36                71
 07/18/2020   07:41:20   (  70.55,  61.69) 07/18/2020   07:41:24  (  70.57,  61.75)    3.08                 4
 07/18/2020   08:32:02   ( -70.44,-130.82) 07/18/2020   08:30:54  ( -70.46,-130.78)    2.81                68
 07/20/2020   23:07:10   ( -71.15,   9.27) 07/20/2020   23:08:20  ( -71.05,  10.73)   53.78                70
 07/20/2020   23:57:43   (  70.53, 177.62) 07/20/2020   23:57:54  (  70.56, 177.63)    3.50                11
 07/21/2020   00:48:26   ( -70.47, -14.97) 07/21/2020   00:47:24  ( -70.46, -14.89)    3.16                62
 07/23/2020   15:23:37   ( -71.40, 124.76) 07/23/2020   15:24:44  ( -71.32, 127.04)   81.51                67
 07/23/2020   16:14:06   (  70.57, -66.53) 07/23/2020   16:14:23  (  70.56, -66.50)    1.52                17
 07/23/2020   17:04:48   ( -70.46, 100.97) 07/23/2020   17:03:53  ( -70.46, 100.98)    0.46                55