Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 14.  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)
 12/16/2019   00:26:45   (  69.28, 171.75) 12/16/2019   00:27:55  (  69.17, 172.69)   39.34                70
 12/16/2019   01:17:18   ( -68.74, -20.18) 12/16/2019   01:17:31  ( -68.72, -20.25)    3.09                13
 12/16/2019   02:08:02   (  68.64, 147.26) 12/16/2019   02:06:58  (  68.62, 147.27)    1.58                64
 12/18/2019   16:43:13   (  69.42, -72.55) 12/18/2019   16:44:22  (  69.34, -71.21)   53.46                69
 12/18/2019   17:33:44   ( -68.77,  95.67) 12/18/2019   17:34:00  ( -68.78,  95.71)    1.98                16
 12/18/2019   18:24:27   (  68.62, -96.81) 12/18/2019   18:23:28  (  68.62, -96.85)    1.73                59
 12/21/2019   08:59:41   (  69.62,  43.06) 12/21/2019   09:00:49  (  69.48,  44.85)   71.01                68
 12/21/2019   09:50:08   ( -68.75,-148.41) 12/21/2019   09:50:30  ( -68.76,-148.45)    1.93                22
 12/21/2019   10:40:52   (  68.65,  19.04) 12/21/2019   10:39:57  (  68.65,  19.06)    0.98                55
 12/24/2019   01:16:10   (  69.81, 158.68) 12/24/2019   01:17:16  (  69.70, 161.02)   90.91                66
 12/24/2019   02:06:34   ( -68.79, -32.56) 12/24/2019   02:07:01  ( -68.76, -32.58)    3.27                27
 12/24/2019   02:57:17   (  68.63, 134.96) 12/24/2019   02:56:28  (  68.65, 134.93)    2.60                49
 12/26/2019   18:22:59   ( -68.77,  83.36) 12/26/2019   18:23:32  ( -68.78,  83.32)    2.29                33
 12/26/2019   19:13:43   (  68.66,-109.19) 12/26/2019   19:12:59  (  68.67,-109.17)    1.19                44