Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 10 4.  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   (  70.67, -86.45) 10/06/2020   17:35:06  (  70.67, -86.45)    0.47                58
 10/06/2020   18:24:49   ( -70.57,  81.04) 10/06/2020   18:24:36  ( -70.56,  81.02)    0.82                13
 10/06/2020   19:15:22   (  69.88,-110.58) 10/06/2020   19:14:13  (  69.91,-112.28)   65.15                69
 10/09/2020   09:50:31   (  70.70,  29.42) 10/09/2020   09:51:35  (  70.70,  29.47)    1.87                64
 10/09/2020   10:41:12   ( -70.59,-163.08) 10/09/2020   10:41:05  ( -70.59,-163.06)    0.89                 7
 10/09/2020   11:31:49   (  70.12,   4.97) 10/09/2020   11:30:38  (  70.15,   3.95)   38.91                71
 10/12/2020   02:06:53   (  70.68, 145.37) 10/12/2020   02:08:05  (  70.66, 145.30)    3.42                72
 10/12/2020   02:57:35   ( -70.62, -47.21) 10/12/2020   02:57:34  ( -70.61, -47.15)    2.34                 1
 10/12/2020   03:48:16   (  70.36, 120.51) 10/12/2020   03:47:03  (  70.39, 120.17)   12.97                73
 10/14/2020   18:23:20   (  70.92, -99.11) 10/14/2020   18:24:31  (  70.84, -98.55)   22.46                71
 10/14/2020   19:13:57   ( -70.59,  68.75) 10/14/2020   19:14:04  ( -70.57,  68.68)    3.42                 7
 10/14/2020   20:04:41   (  70.50,-123.79) 10/14/2020   20:03:30  (  70.52,-123.76)    2.23                71
 10/17/2020   10:39:46   (  71.16,  16.39) 10/17/2020   10:40:55  (  71.07,  17.69)   47.92                69
 10/17/2020   11:30:19   ( -70.62,-175.38) 10/17/2020   11:30:31  ( -70.64,-175.34)    2.79                12
 10/17/2020   12:21:03   (  70.53,  -7.93) 10/17/2020   12:19:58  (  70.53,  -7.86)    2.65                65