Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 12.  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   08:10:17   (  69.13,  56.06) 12/13/2019   08:11:28  (  69.03,  56.64)   25.37                71
 12/13/2019   09:00:53   ( -68.74,-136.09) 12/13/2019   09:01:01  ( -68.75,-136.09)    0.87                 8
 12/13/2019   09:51:36   (  68.59,  31.43) 12/13/2019   09:50:29  (  68.59,  31.36)    2.63                67
 12/16/2019   00:26:44   (  69.22, 171.83) 12/16/2019   00:27:55  (  69.14, 172.65)   33.69                71
 12/16/2019   01:17:18   ( -68.73, -20.17) 12/16/2019   01:17:30  ( -68.75, -20.21)    2.94                12
 12/16/2019   02:08:02   (  68.63, 147.28) 12/16/2019   02:06:57  (  68.64, 147.30)    2.01                65
 12/18/2019   16:43:11   (  69.37, -72.47) 12/18/2019   16:44:21  (  69.25, -71.33)   47.01                70
 12/18/2019   17:33:43   ( -68.77,  95.68) 12/18/2019   17:33:58  ( -68.75,  95.67)    2.23                15
 12/18/2019   18:24:26   (  68.61, -96.81) 12/18/2019   18:23:25  (  68.64, -96.82)    2.94                61
 12/21/2019   08:59:39   (  69.51,  43.22) 12/21/2019   09:00:47  (  69.41,  44.77)   61.72                68
 12/21/2019   09:50:08   ( -68.75,-148.41) 12/21/2019   09:50:27  ( -68.75,-148.45)    2.03                19
 12/21/2019   10:40:52   (  68.65,  19.04) 12/21/2019   10:39:54  (  68.63,  19.06)    2.06                58
 12/24/2019   01:16:06   (  69.61, 158.98) 12/24/2019   01:17:14  (  69.52, 160.79)   71.34                68
 12/24/2019   02:06:34   ( -68.80, -32.57) 12/24/2019   02:06:55  ( -68.80, -32.50)    2.66                21
 12/24/2019   02:57:17   (  68.64, 134.95) 12/24/2019   02:56:23  (  68.63, 134.93)    1.11                54