Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 16.  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)
 12/18/2019   16:43:12   (  69.39, -72.51) 12/18/2019   16:44:22  (  69.26, -71.31)   49.09                70
 12/18/2019   17:33:43   ( -68.74,  95.71) 12/18/2019   17:33:59  ( -68.76,  95.68)    2.34                16
 12/18/2019   18:24:27   (  68.64, -96.84) 12/18/2019   18:23:26  (  68.66, -96.81)    2.49                61
 12/21/2019   08:59:40   (  69.53,  43.18) 12/21/2019   09:00:48  (  69.44,  44.80)   63.94                68
 12/21/2019   09:50:09   ( -68.78,-148.44) 12/21/2019   09:50:28  ( -68.77,-148.43)    1.43                19
 12/21/2019   10:40:52   (  68.62,  19.08) 12/21/2019   10:39:56  (  68.61,  19.01)    3.02                56
 12/24/2019   01:16:06   (  69.63, 158.95) 12/24/2019   01:17:14  (  69.55, 160.83)   73.74                68
 12/24/2019   02:06:33   ( -68.77, -32.53) 12/24/2019   02:06:56  ( -68.78, -32.54)    1.08                23
 12/24/2019   02:57:17   (  68.66, 134.92) 12/24/2019   02:56:23  (  68.67, 134.97)    2.06                54
 12/26/2019   17:32:34   (  69.77, -85.37) 12/26/2019   17:33:41  (  69.66, -83.13)   87.29                67
 12/26/2019   18:22:58   ( -68.76,  83.38) 12/26/2019   18:23:25  ( -68.78,  83.35)    3.19                27
 12/26/2019   19:13:42   (  68.65,-109.16) 12/26/2019   19:12:52  (  68.67,-109.15)    2.56                50
 12/29/2019   10:39:24   ( -68.80,-160.78) 12/29/2019   10:39:54  ( -68.78,-160.77)    1.79                30
 12/29/2019   11:30:08   (  68.69,   6.68) 12/29/2019   11:29:21  (  68.67,   6.73)    3.31                47