Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 5 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)
 05/06/2020   21:46:40   ( -70.62,  30.04) 05/06/2020   21:47:37  ( -70.63,  30.02)    1.57                57
 05/06/2020   22:37:24   (  70.51,-162.46) 05/06/2020   22:37:04  (  70.52,-162.49)    2.23                20
 05/06/2020   23:27:53   ( -69.78,   5.99) 05/06/2020   23:26:45  ( -69.81,   4.12)   71.65                68
 05/09/2020   14:03:04   ( -70.63, 145.94) 05/09/2020   14:04:04  ( -70.65, 145.93)    2.38                60
 05/09/2020   14:53:48   (  70.52, -46.57) 05/09/2020   14:53:31  (  70.54, -46.59)    2.60                17
 05/09/2020   15:44:19   ( -69.89, 121.72) 05/09/2020   15:43:10  ( -69.94, 120.18)   59.01                69
 05/12/2020   06:19:28   ( -70.64, -98.18) 05/12/2020   06:20:31  ( -70.67, -98.17)    2.73                63
 05/12/2020   07:10:12   (  70.53,  69.31) 05/12/2020   07:09:58  (  70.55,  69.31)    2.42                14
 05/12/2020   08:00:44   ( -70.01,-122.55) 05/12/2020   07:59:34  ( -70.07,-123.76)   46.53                70
 05/14/2020   22:35:51   ( -70.66,  17.71) 05/14/2020   22:36:57  ( -70.68,  17.73)    2.43                66
 05/14/2020   23:26:35   (  70.55,-174.80) 05/14/2020   23:26:24  (  70.56,-174.80)    1.60                11
 05/15/2020   00:17:10   ( -70.13,  -6.82) 05/15/2020   00:15:59  ( -70.19,  -7.71)   34.20                71
 05/17/2020   14:52:15   ( -70.67, 133.59) 05/17/2020   14:53:24  ( -70.68, 133.62)    1.53                69
 05/17/2020   15:42:59   (  70.57, -58.92) 05/17/2020   15:42:51  (  70.57, -58.92)    0.34                 8
 05/17/2020   16:33:36   ( -70.25, 108.90) 05/17/2020   16:32:24  ( -70.30, 108.33)   22.01                72