Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 10 10.  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)
 10/12/2019   17:01:49   ( -69.32, 102.95) 10/12/2019   17:03:00  ( -69.23, 103.93)   39.68                71
 10/12/2019   17:52:25   (  68.79, -89.01) 10/12/2019   17:52:33  (  68.79, -88.99)    0.87                 8
 10/12/2019   18:43:06   ( -68.67,  78.47) 10/12/2019   18:42:03  ( -68.68,  78.51)    2.16                63
 10/15/2019   09:18:17   ( -69.41,-141.30) 10/15/2019   09:19:27  ( -69.32,-140.08)   48.96                70
 10/15/2019   10:08:51   (  68.79,  26.88) 10/15/2019   10:09:02  (  68.76,  26.85)    3.09                11
 10/15/2019   10:59:32   ( -68.66,-165.63) 10/15/2019   10:58:32  ( -68.66,-165.64)    0.77                60
 10/18/2019   01:34:44   ( -69.51, -25.55) 10/18/2019   01:35:53  ( -69.39, -24.10)   58.22                69
 10/18/2019   02:25:16   (  68.79, 142.77) 10/18/2019   02:25:29  (  68.78, 142.76)    1.01                13
 10/18/2019   03:15:57   ( -68.65, -49.73) 10/18/2019   03:14:59  ( -68.68, -49.74)    2.64                58
 10/20/2019   17:51:11   ( -69.56,  90.27) 10/20/2019   17:52:20  ( -69.47,  91.87)   63.42                69
 10/20/2019   18:41:42   (  68.79,-101.34) 10/20/2019   18:41:57  (  68.79,-101.35)    0.68                15
 10/20/2019   19:32:24   ( -68.70,  66.09) 10/20/2019   19:31:27  ( -68.69,  66.16)    3.00                57
 10/23/2019   10:07:39   ( -69.67,-153.99) 10/23/2019   10:08:47  ( -69.53,-152.16)   72.58                68
 10/23/2019   10:58:08   (  68.79,  14.55) 10/23/2019   10:58:25  (  68.80,  14.54)    0.81                17
 10/23/2019   11:48:50   ( -68.70,-178.01) 10/23/2019   11:47:55  ( -68.70,-177.95)    2.61                55