Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 19.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2019   08:59:39   (  69.52,  43.21) 12/21/2019   09:00:48  (  69.38,  44.73)   61.26                69
 12/21/2019   09:50:08   ( -68.77,-148.43) 12/21/2019   09:50:27  ( -68.77,-148.43)    0.36                19
 12/21/2019   10:40:52   (  68.66,  19.03) 12/21/2019   10:39:54  (  68.67,  19.09)    2.52                58
 12/24/2019   01:16:07   (  69.66, 158.90) 12/24/2019   01:17:14  (  69.55, 160.83)   75.96                67
 12/24/2019   02:06:33   ( -68.75, -32.51) 12/24/2019   02:06:56  ( -68.77, -32.55)    2.93                23
 12/24/2019   02:57:17   (  68.64, 134.95) 12/24/2019   02:56:23  (  68.67, 134.97)    3.07                54
 12/26/2019   17:32:34   (  69.75, -85.34) 12/26/2019   17:33:41  (  69.66, -83.14)   85.31                67
 12/26/2019   18:22:59   ( -68.79,  83.34) 12/26/2019   18:23:25  ( -68.77,  83.33)    1.91                26
 12/26/2019   19:13:43   (  68.68,-109.20) 12/26/2019   19:12:52  (  68.66,-109.16)    2.36                51
 12/29/2019   09:49:02   (  69.89,  30.34) 12/29/2019   09:50:08  (  69.76,  32.88)   98.31                66
 12/29/2019   10:39:24   ( -68.77,-160.74) 12/29/2019   10:39:54  ( -68.77,-160.79)    2.17                30
 12/29/2019   11:30:08   (  68.66,   6.71) 12/29/2019   11:29:21  (  68.66,   6.71)    0.48                47
 01/01/2020   02:55:49   ( -68.81, -44.90) 01/01/2020   02:56:21  ( -68.81, -44.85)    1.83                32
 01/01/2020   03:46:32   (  68.65, 122.63) 01/01/2020   03:45:49  (  68.65, 122.58)    1.99                43