Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 18.  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)
 12/18/2019   16:43:12   (  69.38, -72.49) 12/18/2019   16:44:22  (  69.27, -71.30)   48.05                70
 12/18/2019   17:33:44   ( -68.78,  95.66) 12/18/2019   17:33:59  ( -68.76,  95.68)    2.46                15
 12/18/2019   18:24:27   (  68.62, -96.82) 12/18/2019   18:23:27  (  68.61, -96.87)    2.63                60
 12/21/2019   08:59:39   (  69.52,  43.20) 12/21/2019   09:00:48  (  69.38,  44.72)   61.22                69
 12/21/2019   09:50:08   ( -68.77,-148.42) 12/21/2019   09:50:27  ( -68.77,-148.44)    0.44                19
 12/21/2019   10:40:52   (  68.66,  19.03) 12/21/2019   10:39:54  (  68.66,  19.08)    2.19                58
 12/24/2019   01:16:06   (  69.61, 158.97) 12/24/2019   01:17:14  (  69.54, 160.82)   72.02                68
 12/24/2019   02:06:33   ( -68.75, -32.51) 12/24/2019   02:06:56  ( -68.76, -32.56)    2.62                23
 12/24/2019   02:57:17   (  68.64, 134.95) 12/24/2019   02:56:23  (  68.66, 134.95)    1.83                54
 12/26/2019   17:32:34   (  69.75, -85.34) 12/26/2019   17:33:41  (  69.64, -83.17)   84.80                67
 12/26/2019   18:22:59   ( -68.79,  83.34) 12/26/2019   18:23:24  ( -68.81,  83.38)    3.02                25
 12/26/2019   19:13:42   (  68.62,-109.13) 12/26/2019   19:12:52  (  68.65,-109.18)    3.00                50
 12/29/2019   09:49:02   (  69.89,  30.34) 12/29/2019   09:50:07  (  69.79,  32.92)   99.44                65
 12/29/2019   10:39:24   ( -68.77,-160.74) 12/29/2019   10:39:53  ( -68.80,-160.76)    2.57                29
 12/29/2019   11:30:08   (  68.66,   6.71) 12/29/2019   11:29:20  (  68.68,   6.75)    2.83                48