Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 24.  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)
 01/26/2020   01:41:58   ( -70.80, -29.22) 01/26/2020   01:43:10  ( -70.69, -28.51)   28.43                72
 01/26/2020   02:32:37   (  70.42, 138.70) 01/26/2020   02:32:40  (  70.42, 138.73)    1.14                 3
 01/26/2020   03:23:18   ( -70.32, -53.82) 01/26/2020   03:22:10  ( -70.31, -53.79)    1.36                68
 01/28/2020   17:58:25   ( -70.90,  86.51) 01/28/2020   17:59:36  ( -70.81,  87.56)   39.55                71
 01/28/2020   18:49:02   (  70.42,-105.41) 01/28/2020   18:49:08  (  70.43,-105.37)    1.60                 6
 01/28/2020   19:39:43   ( -70.32,  62.08) 01/28/2020   19:38:38  ( -70.33,  62.11)    1.26                65
 01/31/2020   10:14:52   ( -71.06,-157.86) 01/31/2020   10:16:01  ( -70.93,-156.38)   55.59                69
 01/31/2020   11:05:26   (  70.43,  10.48) 01/31/2020   11:05:35  (  70.44,  10.52)    1.79                 9
 01/31/2020   11:56:07   ( -70.32, 177.97) 01/31/2020   11:55:05  ( -70.34, 178.00)    1.77                62
 02/03/2020   02:31:19   ( -71.17, -42.15) 02/03/2020   02:32:27  ( -71.05, -40.32)   67.25                68
 02/03/2020   03:21:51   (  70.44, 126.36) 02/03/2020   03:22:03  (  70.45, 126.41)    1.83                12
 02/03/2020   04:12:32   ( -70.33, -66.14) 02/03/2020   04:11:33  ( -70.34, -66.10)    1.99                59
 02/05/2020   18:47:46   ( -71.28,  73.56) 02/05/2020   18:48:53  ( -71.16,  75.74)   79.06                67
 02/05/2020   19:38:16   (  70.46,-117.76) 02/05/2020   19:38:31  (  70.45,-117.70)    2.11                15
 02/05/2020   20:28:57   ( -70.33,  49.76) 02/05/2020   20:28:01  ( -70.35,  49.78)    1.76                56