Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 5 3.  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   05:30:17   ( -70.63, -85.89) 05/04/2020   05:31:10  ( -70.64, -85.84)    1.85                53
 05/04/2020   06:21:01   (  70.52,  81.60) 05/04/2020   06:20:37  (  70.53,  81.64)    1.95                24
 05/04/2020   07:11:28   ( -69.68,-109.79) 05/04/2020   07:10:20  ( -69.71,-111.89)   81.34                68
 05/06/2020   21:46:41   ( -70.64,  30.01) 05/06/2020   21:47:38  ( -70.61,  29.99)    3.46                57
 05/06/2020   22:37:24   (  70.53,-162.51) 05/06/2020   22:37:03  (  70.56,-162.45)    3.42                21
 05/06/2020   23:27:53   ( -69.80,   5.95) 05/06/2020   23:26:44  ( -69.85,   4.17)   68.43                69
 05/09/2020   14:03:04   ( -70.66, 145.89) 05/09/2020   14:04:04  ( -70.63, 145.90)    2.38                60
 05/09/2020   14:53:48   (  70.55, -46.62) 05/09/2020   14:53:31  (  70.52, -46.62)    2.87                17
 05/09/2020   15:44:19   ( -69.92, 121.68) 05/09/2020   15:43:09  ( -69.98, 120.23)   55.69                70
 05/12/2020   06:19:28   ( -70.67, -98.22) 05/12/2020   06:20:31  ( -70.65, -98.19)    2.22                63
 05/12/2020   07:10:12   (  70.56,  69.26) 05/12/2020   07:09:58  (  70.54,  69.28)    2.95                14
 05/12/2020   08:00:45   ( -70.04,-122.59) 05/12/2020   07:59:34  ( -70.11,-123.71)   43.10                71
 05/14/2020   22:35:52   ( -70.69,  17.66) 05/14/2020   22:36:58  ( -70.67,  17.71)    2.79                66
 05/14/2020   23:26:35   (  70.53,-174.77) 05/14/2020   23:26:25  (  70.55,-174.82)    3.02                10
 05/15/2020   00:17:11   ( -70.16,  -6.87) 05/15/2020   00:15:59  ( -70.23,  -7.65)   30.68                72