Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 29.  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)
 12/30/2019   06:57:44   ( -70.44,-107.64) 12/30/2019   06:58:33  ( -70.43,-107.68)    1.95                49
 12/30/2019   07:48:28   (  70.33,  59.85) 12/30/2019   07:48:00  (  70.33,  59.81)    1.50                28
 01/01/2020   23:14:08   ( -70.43,   8.28) 01/01/2020   23:15:00  ( -70.45,   8.22)    2.80                52
 01/02/2020   00:04:52   (  70.32, 175.77) 01/02/2020   00:04:27  (  70.34, 175.71)    3.19                25
 01/02/2020   00:55:18   ( -69.42, -15.57) 01/02/2020   00:54:11  ( -69.46, -17.88)   90.35                67
 01/04/2020   15:30:34   ( -70.47, 124.11) 01/04/2020   15:31:28  ( -70.46, 124.12)    1.77                54
 01/04/2020   16:21:18   (  70.36, -68.40) 01/04/2020   16:20:55  (  70.34, -68.40)    1.59                23
 01/04/2020   17:11:45   ( -69.52, 100.19) 01/04/2020   17:10:37  ( -69.58,  98.16)   79.19                68
 01/07/2020   07:46:59   ( -70.46,-119.97) 01/07/2020   07:47:56  ( -70.46,-119.99)    0.77                57
 01/07/2020   08:37:43   (  70.35,  47.52) 01/07/2020   08:37:23  (  70.35,  47.49)    1.05                20
 01/07/2020   09:28:12   ( -69.61,-144.05) 01/07/2020   09:27:03  ( -69.70,-145.80)   68.34                69
 01/10/2020   00:03:24   ( -70.45,  -4.06) 01/10/2020   00:04:24  ( -70.46,  -4.11)    2.43                60
 01/10/2020   00:54:08   (  70.34, 163.43) 01/10/2020   00:53:51  (  70.35, 163.37)    2.47                17