Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 5 7.  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)
 05/09/2020   14:03:03   ( -70.62, 145.96) 05/09/2020   14:04:04  ( -70.62, 145.88)    2.85                61
 05/09/2020   14:53:48   (  70.55, -46.63) 05/09/2020   14:53:30  (  70.57, -46.55)    3.23                18
 05/09/2020   15:44:19   ( -69.93, 121.66) 05/09/2020   15:43:09  ( -69.97, 120.21)   55.39                70
 05/12/2020   06:19:27   ( -70.63, -98.16) 05/12/2020   06:20:31  ( -70.64, -98.21)    2.26                64
 05/12/2020   07:10:11   (  70.52,  69.34) 05/12/2020   07:09:58  (  70.53,  69.27)    2.81                13
 05/12/2020   08:00:45   ( -70.05,-122.61) 05/12/2020   07:59:34  ( -70.10,-123.73)   42.58                71
 05/14/2020   22:35:51   ( -70.65,  17.73) 05/14/2020   22:36:58  ( -70.66,  17.69)    1.60                67
 05/14/2020   23:26:35   (  70.53,-174.78) 05/14/2020   23:26:25  (  70.54,-174.83)    1.97                10
 05/15/2020   00:17:11   ( -70.17,  -6.89) 05/15/2020   00:15:59  ( -70.22,  -7.67)   29.89                72
 05/17/2020   14:52:15   ( -70.67, 133.61) 05/17/2020   14:53:25  ( -70.67, 133.59)    0.69                70
 05/17/2020   15:42:59   (  70.56, -58.91) 05/17/2020   15:42:52  (  70.55, -58.94)    1.35                 7
 05/17/2020   16:33:37   ( -70.30, 108.83) 05/17/2020   16:32:24  ( -70.34, 108.39)   17.35                73
 05/20/2020   07:08:39   ( -70.74,-110.60) 05/20/2020   07:09:50  ( -70.73,-110.44)    6.15                71
 05/20/2020   07:59:22   (  70.58,  56.96) 05/20/2020   07:59:18  (  70.56,  56.95)    2.51                 4
 05/20/2020   08:50:02   ( -70.42,-135.46) 05/20/2020   08:48:48  ( -70.46,-135.56)    5.69                74