Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 13.  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)
 12/13/2019   08:10:16   (  69.11,  56.09) 12/13/2019   08:11:28  (  69.01,  56.60)   23.35                72
 12/13/2019   09:00:52   ( -68.72,-136.06) 12/13/2019   09:01:01  ( -68.72,-136.12)    2.64                 9
 12/13/2019   09:51:36   (  68.62,  31.38) 12/13/2019   09:50:28  (  68.63,  31.40)    0.65                68
 12/16/2019   00:26:44   (  69.25, 171.79) 12/16/2019   00:27:55  (  69.14, 172.65)   36.17                71
 12/16/2019   01:17:18   ( -68.76, -20.21) 12/16/2019   01:17:30  ( -68.75, -20.21)    1.10                12
 12/16/2019   02:08:02   (  68.66, 147.24) 12/16/2019   02:06:57  (  68.65, 147.31)    3.08                65
 12/18/2019   16:43:12   (  69.39, -72.51) 12/18/2019   16:44:22  (  69.29, -71.27)   49.85                70
 12/18/2019   17:33:43   ( -68.74,  95.71) 12/18/2019   17:34:00  ( -68.73,  95.65)    2.76                17
 12/18/2019   18:24:27   (  68.64, -96.84) 12/18/2019   18:23:27  (  68.63, -96.84)    0.98                60
 12/21/2019   08:59:41   (  69.59,  43.11) 12/21/2019   09:00:49  (  69.46,  44.82)   68.42                68
 12/21/2019   09:50:09   ( -68.78,-148.44) 12/21/2019   09:50:29  ( -68.79,-148.40)    2.29                20
 12/21/2019   10:40:52   (  68.62,  19.08) 12/21/2019   10:39:57  (  68.63,  19.04)    1.92                55
 12/24/2019   01:16:08   (  69.73, 158.79) 12/24/2019   01:17:15  (  69.64, 160.95)   83.70                67
 12/24/2019   02:06:33   ( -68.76, -32.52) 12/24/2019   02:06:59  ( -68.76, -32.57)    2.15                26
 12/24/2019   02:57:17   (  68.66, 134.93) 12/24/2019   02:56:26  (  68.65, 134.94)    1.16                51
 12/26/2019   18:22:59   ( -68.80,  83.32) 12/26/2019   18:23:29  ( -68.79,  83.35)    1.13                30
 12/26/2019   19:13:42   (  68.64,-109.16) 12/26/2019   19:12:57  (  68.63,-109.22)    3.01                45