Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 5 4.  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)
 05/04/2020   05:30:16   ( -70.60, -85.84) 05/04/2020   05:31:10  ( -70.62, -85.88)    2.23                54
 05/04/2020   06:21:00   (  70.49,  81.65) 05/04/2020   06:20:37  (  70.51,  81.61)    2.84                23
 05/04/2020   07:11:27   ( -69.65,-109.74) 05/04/2020   07:10:20  ( -69.69,-111.93)   84.57                67
 05/06/2020   21:46:41   ( -70.66,  29.97) 05/06/2020   21:47:37  ( -70.64,  30.04)    3.30                56
 05/06/2020   22:37:25   (  70.55,-162.54) 05/06/2020   22:37:04  (  70.53,-162.48)    2.91                21
 05/06/2020   23:27:53   ( -69.77,   6.00) 05/06/2020   23:26:45  ( -69.82,   4.14)   71.83                68
 05/09/2020   14:03:05   ( -70.67, 145.87) 05/09/2020   14:04:04  ( -70.66, 145.95)    3.11                59
 05/09/2020   14:53:49   (  70.56, -46.64) 05/09/2020   14:53:31  (  70.55, -46.58)    2.81                18
 05/09/2020   15:44:20   ( -69.93, 121.66) 05/09/2020   15:43:10  ( -69.95, 120.20)   55.71                70
 05/12/2020   06:19:27   ( -70.63, -98.16) 05/12/2020   06:20:31  ( -70.63, -98.23)    2.86                64
 05/12/2020   07:10:12   (  70.57,  69.24) 05/12/2020   07:09:57  (  70.56,  69.32)    3.09                15
 05/12/2020   08:00:45   ( -70.05,-122.61) 05/12/2020   07:59:34  ( -70.08,-123.75)   43.15                71
 05/14/2020   22:35:51   ( -70.64,  17.73) 05/14/2020   22:36:58  ( -70.64,  17.66)    2.55                67
 05/14/2020   23:26:35   (  70.54,-174.79) 05/14/2020   23:26:25  (  70.52,-174.87)    3.45                10
 05/15/2020   00:17:11   ( -70.17,  -6.89) 05/15/2020   00:15:59  ( -70.20,  -7.70)   30.76                72
 05/17/2020   14:52:15   ( -70.66, 133.62) 05/17/2020   14:53:25  ( -70.64, 133.56)    2.67                70
 05/17/2020   15:42:59   (  70.55, -58.90) 05/17/2020   15:42:51  (  70.58, -58.90)    3.28                 8
 05/17/2020   16:33:37   ( -70.29, 108.84) 05/17/2020   16:32:24  ( -70.32, 108.35)   18.53                73