Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 6.  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)
 01/07/2020   07:46:59   ( -70.49,-120.01) 01/07/2020   07:47:56  ( -70.50,-119.94)    2.91                57
 01/07/2020   08:37:43   (  70.37,  47.48) 01/07/2020   08:37:24  (  70.34,  47.46)    3.24                19
 01/07/2020   09:28:12   ( -69.64,-144.09) 01/07/2020   09:27:03  ( -69.74,-145.75)   65.28                69
 01/10/2020   00:03:24   ( -70.48,  -4.11) 01/10/2020   00:04:25  ( -70.49,  -4.08)    1.36                61
 01/10/2020   00:54:08   (  70.37, 163.39) 01/10/2020   00:53:52  (  70.38, 163.41)    1.98                16
 01/10/2020   01:44:40   ( -69.80, -28.42) 01/10/2020   01:43:30  ( -69.84, -29.74)   50.83                70
 01/12/2020   16:19:48   ( -70.48, 111.79) 01/12/2020   16:20:53  ( -70.49, 111.80)    0.86                65
 01/12/2020   17:10:32   (  70.37, -80.72) 01/12/2020   17:10:20  (  70.38, -80.72)    1.41                12
 01/12/2020   18:01:07   ( -69.95,  87.25) 01/12/2020   17:59:55  ( -70.00,  86.37)   33.77                72
 01/15/2020   08:36:13   ( -70.48,-132.31) 01/15/2020   08:37:22  ( -70.50,-132.31)    1.56                69
 01/15/2020   09:26:57   (  70.37,  35.18) 01/15/2020   09:26:49  (  70.39,  35.16)    1.73                 8
 01/15/2020   10:17:34   ( -70.06,-157.02) 01/15/2020   10:16:22  ( -70.12,-157.59)   22.60                72
 01/18/2020   00:52:39   ( -70.54, -16.50) 01/18/2020   00:53:51  ( -70.51, -16.41)    4.27                72
 01/18/2020   01:43:22   (  70.38, 151.07) 01/18/2020   01:43:18  (  70.40, 151.06)    2.57                 4
 01/18/2020   02:34:02   ( -70.22, -41.37) 01/18/2020   02:32:49  ( -70.25, -41.53)    6.80                73