Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 10 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)
 10/06/2020   17:34:08   (  70.64, -86.41) 10/06/2020   17:35:07  (  70.64, -86.49)    3.01                59
 10/06/2020   18:24:50   ( -70.59,  80.99) 10/06/2020   18:24:36  ( -70.59,  81.06)    2.51                14
 10/06/2020   19:15:22   (  69.85,-110.54) 10/06/2020   19:14:13  (  69.94,-112.24)   65.75                69
 10/09/2020   09:50:31   (  70.68,  29.46) 10/09/2020   09:51:36  (  70.67,  29.42)    1.72                65
 10/09/2020   10:41:12   ( -70.57,-163.05) 10/09/2020   10:41:06  ( -70.56,-163.11)    2.66                 6
 10/09/2020   11:31:49   (  70.10,   5.01) 10/09/2020   11:30:38  (  70.18,   3.98)   39.77                71
 10/12/2020   02:06:53   (  70.71, 145.32) 10/12/2020   02:08:04  (  70.68, 145.33)    3.29                71
 10/12/2020   02:57:34   ( -70.60, -47.18) 10/12/2020   02:57:34  ( -70.57, -47.20)    2.67                 0
 10/12/2020   03:48:15   (  70.34, 120.54) 10/12/2020   03:47:02  (  70.41, 120.21)   14.80                73
 10/14/2020   18:23:19   (  70.90, -99.09) 10/14/2020   18:24:31  (  70.80, -98.60)   20.92                72
 10/14/2020   19:13:56   ( -70.58,  68.78) 10/14/2020   19:14:03  ( -70.59,  68.70)    3.03                 7
 10/14/2020   20:04:40   (  70.48,-123.77) 10/14/2020   20:03:30  (  70.48,-123.81)    1.75                70
 10/17/2020   10:39:46   (  71.15,  16.41) 10/17/2020   10:40:56  (  71.03,  17.63)   45.96                70
 10/17/2020   11:30:19   ( -70.61,-175.36) 10/17/2020   11:30:32  ( -70.60,-175.40)    1.77                13
 10/17/2020   12:21:03   (  70.52,  -7.91) 10/17/2020   12:19:58  (  70.54,  -7.84)    3.55                65