Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 5.  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)
 07/07/2020   13:45:04   ( -70.60, 150.65) 07/07/2020   13:45:59  ( -70.62, 150.67)    2.97                55
 07/07/2020   14:35:47   (  70.48, -41.85) 07/07/2020   14:35:27  (  70.47, -41.92)    3.06                20
 07/07/2020   15:26:15   ( -69.70, 126.67) 07/07/2020   15:25:07  ( -69.75, 124.69)   76.29                68
 07/10/2020   06:01:27   ( -70.63, -93.50) 07/10/2020   06:02:28  ( -70.63, -93.44)    2.23                61
 07/10/2020   06:52:10   (  70.52,  74.00) 07/10/2020   06:51:55  (  70.53,  74.05)    2.18                15
 07/10/2020   07:42:43   ( -69.95,-117.80) 07/10/2020   07:41:33  ( -69.98,-119.11)   50.17                70
 07/12/2020   22:17:50   ( -70.62,  22.43) 07/12/2020   22:18:58  ( -70.64,  22.45)    2.12                68
 07/12/2020   23:08:33   (  70.51,-170.08) 07/12/2020   23:08:25  (  70.53,-170.06)    2.41                 8
 07/12/2020   23:59:11   ( -70.20,  -2.27) 07/12/2020   23:57:58  ( -70.26,  -2.83)   22.26                73
 07/15/2020   14:34:15   ( -70.71, 138.19) 07/15/2020   14:35:27  ( -70.70, 138.42)    8.46                72
 07/15/2020   15:24:57   (  70.56, -54.24) 07/15/2020   15:24:55  (  70.53, -54.18)    3.25                 2
 07/15/2020   16:15:38   ( -70.40, 113.33) 07/15/2020   16:14:25  ( -70.43, 113.30)    3.91                73
 07/18/2020   06:50:43   ( -70.96,-106.31) 07/18/2020   06:51:54  ( -70.86,-105.45)   33.34                71
 07/18/2020   07:41:19   (  70.55,  61.69) 07/18/2020   07:41:24  (  70.53,  61.69)    2.06                 5
 07/18/2020   08:32:01   ( -70.44,-130.82) 07/18/2020   08:30:54  ( -70.43,-130.82)    1.09                67