Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 9.  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)
 01/10/2020   00:03:24   ( -70.50,  -4.13) 01/10/2020   00:04:25  ( -70.49,  -4.09)    2.27                61
 01/10/2020   00:54:08   (  70.38, 163.37) 01/10/2020   00:53:52  (  70.38, 163.40)    1.33                16
 01/10/2020   01:44:40   ( -69.81, -28.44) 01/10/2020   01:43:30  ( -69.84, -29.74)   50.02                70
 01/12/2020   16:19:49   ( -70.50, 111.77) 01/12/2020   16:20:54  ( -70.50, 111.81)    1.80                65
 01/12/2020   17:10:33   (  70.38, -80.73) 01/12/2020   17:10:21  (  70.40, -80.70)    2.43                12
 01/12/2020   18:01:08   ( -69.96,  87.23) 01/12/2020   17:59:56  ( -70.02,  86.39)   32.56                72
 01/15/2020   08:36:14   ( -70.49,-132.32) 01/15/2020   08:37:24  ( -70.48,-132.35)    1.56                70
 01/15/2020   09:26:57   (  70.37,  35.18) 01/15/2020   09:26:50  (  70.37,  35.13)    1.61                 7
 01/15/2020   10:17:35   ( -70.12,-157.11) 01/15/2020   10:16:22  ( -70.16,-157.54)   16.95                73
 01/18/2020   00:52:40   ( -70.59, -16.58) 01/18/2020   00:53:51  ( -70.58, -16.33)    9.49                71
 01/18/2020   01:43:23   (  70.42, 150.99) 01/18/2020   01:43:19  (  70.41, 151.07)    3.22                 4
 01/18/2020   02:34:03   ( -70.27, -41.44) 01/18/2020   02:32:50  ( -70.26, -41.52)    3.37                73
 01/20/2020   17:09:08   ( -70.74,  99.07) 01/20/2020   17:10:20  ( -70.63,  99.63)   23.97                72
 01/20/2020   17:59:48   (  70.42, -93.11) 01/20/2020   17:59:49  (  70.41, -93.06)    2.33                 1
 01/20/2020   18:50:29   ( -70.32,  74.38) 01/20/2020   18:49:19  ( -70.31,  74.43)    2.19                70