Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 7.  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)
 12/07/2019   23:37:22   (  68.90,-175.41) 12/07/2019   23:38:33  (  68.89,-175.31)    4.02                71
 12/08/2019   00:28:02   ( -68.72,  -7.84) 12/08/2019   00:28:04  ( -68.72,  -7.89)    2.03                 2
 12/08/2019   01:18:45   (  68.57, 159.66) 12/08/2019   01:17:32  (  68.56, 159.56)    4.33                73
 12/10/2019   15:53:49   (  68.98, -59.63) 12/10/2019   15:55:01  (  68.94, -59.37)   11.55                72
 12/10/2019   16:44:28   ( -68.75, 108.01) 12/10/2019   16:44:32  ( -68.77, 108.05)    2.79                 4
 12/10/2019   17:35:11   (  68.60, -84.48) 12/10/2019   17:34:00  (  68.61, -84.51)    0.92                71
 12/13/2019   08:10:17   (  69.12,  56.08) 12/13/2019   08:11:28  (  69.03,  56.63)   24.42                71
 12/13/2019   09:00:53   ( -68.73,-136.07) 12/13/2019   09:01:01  ( -68.76,-136.08)    2.98                 8
 12/13/2019   09:51:37   (  68.64,  31.37) 12/13/2019   09:50:28  (  68.65,  31.42)    2.56                69
 12/16/2019   00:26:43   (  69.21, 171.85) 12/16/2019   00:27:54  (  69.12, 172.63)   32.56                71
 12/16/2019   01:17:18   ( -68.77, -20.22) 12/16/2019   01:17:29  ( -68.74, -20.22)    3.17                11
 12/16/2019   02:08:01   (  68.62, 147.29) 12/16/2019   02:06:56  (  68.63, 147.28)    0.83                65
 12/18/2019   16:43:11   (  69.36, -72.46) 12/18/2019   16:44:21  (  69.21, -71.38)   45.66                70
 12/18/2019   17:33:43   ( -68.75,  95.70) 12/18/2019   17:33:57  ( -68.77,  95.70)    2.10                14
 12/18/2019   18:24:27   (  68.65, -96.86) 12/18/2019   18:23:24  (  68.66, -96.80)    2.64                63