Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 1.  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)
 07/02/2020   05:12:17   ( -70.59, -81.17) 07/02/2020   05:12:59  ( -70.58, -81.16)    1.68                42
 07/02/2020   06:03:00   (  70.46,  86.35) 07/02/2020   06:02:26  (  70.48,  86.34)    1.76                34
 07/04/2020   21:28:40   ( -70.57,  34.77) 07/04/2020   21:29:29  ( -70.59,  34.74)    2.66                49
 07/04/2020   22:19:24   (  70.50,-157.80) 07/04/2020   22:18:56  (  70.49,-157.76)    1.82                28
 07/07/2020   13:45:04   ( -70.61, 150.63) 07/07/2020   13:45:59  ( -70.61, 150.64)    0.57                55
 07/07/2020   14:35:47   (  70.49, -41.87) 07/07/2020   14:35:26  (  70.51, -41.87)    1.60                21
 07/07/2020   15:26:16   ( -69.71, 126.65) 07/07/2020   15:25:08  ( -69.74, 124.67)   76.17                68
 07/10/2020   06:01:28   ( -70.64, -93.52) 07/10/2020   06:02:29  ( -70.62, -93.46)    3.31                61
 07/10/2020   06:52:11   (  70.53,  73.97) 07/10/2020   06:51:56  (  70.51,  74.03)    2.80                15
 07/10/2020   07:42:44   ( -69.96,-117.81) 07/10/2020   07:41:33  ( -70.03,-119.05)   47.62                71
 07/12/2020   22:17:50   ( -70.63,  22.42) 07/12/2020   22:18:58  ( -70.63,  22.44)    0.76                68
 07/12/2020   23:08:33   (  70.52,-170.10) 07/12/2020   23:08:25  (  70.52,-170.08)    0.66                 8
 07/12/2020   23:59:11   ( -70.21,  -2.28) 07/12/2020   23:57:58  ( -70.25,  -2.84)   21.70                73