Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 9.  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)
 12/10/2019   15:53:49   (  68.99, -59.64) 12/10/2019   15:55:01  (  68.93, -59.38)   12.43                72
 12/10/2019   16:44:28   ( -68.76, 108.00) 12/10/2019   16:44:32  ( -68.76, 108.04)    1.86                 4
 12/10/2019   17:35:11   (  68.61, -84.49) 12/10/2019   17:34:00  (  68.60, -84.51)    1.35                71
 12/13/2019   08:10:17   (  69.13,  56.07) 12/13/2019   08:11:28  (  69.03,  56.63)   25.05                71
 12/13/2019   09:00:53   ( -68.74,-136.08) 12/13/2019   09:01:01  ( -68.75,-136.09)    1.89                 8
 12/13/2019   09:51:37   (  68.64,  31.36) 12/13/2019   09:50:28  (  68.64,  31.42)    2.62                69
 12/16/2019   00:26:44   (  69.22, 171.84) 12/16/2019   00:27:55  (  69.13, 172.64)   33.01                71
 12/16/2019   01:17:19   ( -68.77, -20.23) 12/16/2019   01:17:30  ( -68.74, -20.22)    3.42                11
 12/16/2019   02:08:02   (  68.62, 147.28) 12/16/2019   02:06:57  (  68.63, 147.29)    0.77                65
 12/18/2019   16:43:11   (  69.36, -72.46) 12/18/2019   16:44:21  (  69.22, -71.36)   45.98                70
 12/18/2019   17:33:43   ( -68.75,  95.69) 12/18/2019   17:33:57  ( -68.78,  95.71)    2.94                14
 12/18/2019   18:24:26   (  68.60, -96.80) 12/18/2019   18:23:25  (  68.61, -96.85)    2.47                61
 12/21/2019   08:59:38   (  69.45,  43.31) 12/21/2019   09:00:47  (  69.36,  44.71)   55.69                69
 12/21/2019   09:50:08   ( -68.74,-148.39) 12/21/2019   09:50:26  ( -68.76,-148.43)    2.98                18
 12/21/2019   10:40:52   (  68.64,  19.05) 12/21/2019   10:39:53  (  68.64,  19.07)    0.87                59