Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 9 15.  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)
 09/15/2019   22:17:20   ( -68.83,  24.73) 09/15/2019   22:18:20  ( -68.85,  24.69)    2.69                60
 09/15/2019   23:08:05   (  68.75,-167.86) 09/15/2019   23:07:47  (  68.75,-167.80)    2.59                18
 09/15/2019   23:58:36   ( -68.13,   0.28) 09/15/2019   23:57:25  ( -68.19,  -0.84)   46.87                71
 09/18/2019   14:33:46   ( -68.86, 140.58) 09/18/2019   14:34:50  ( -68.88, 140.59)    1.90                64
 09/18/2019   15:24:30   (  68.73, -51.94) 09/18/2019   15:24:18  (  68.72, -51.97)    2.15                12
 09/18/2019   16:15:05   ( -68.32, 115.92) 09/18/2019   16:13:53  ( -68.33, 115.19)   30.17                72
 09/21/2019   06:50:13   ( -68.89,-103.57) 09/21/2019   06:51:23  ( -68.88,-103.55)    1.12                70
 09/21/2019   07:40:57   (  68.76,  63.90) 09/21/2019   07:40:50  (  68.78,  63.96)    2.68                 7
 09/21/2019   08:31:35   ( -68.51,-128.43) 09/21/2019   08:30:22  ( -68.56,-128.67)   11.38                73
 09/23/2019   23:06:44   ( -69.13,  11.98) 09/23/2019   23:07:55  ( -69.03,  12.50)   22.98                71
 09/23/2019   23:57:23   (  68.74, 179.82) 09/23/2019   23:57:25  (  68.76, 179.79)    1.84                 2
 09/24/2019   00:48:04   ( -68.64, -12.72) 09/24/2019   00:46:55  ( -68.66, -12.70)    2.14                69
 09/26/2019   15:23:16   ( -69.42, 127.46) 09/26/2019   15:24:26  ( -69.33, 128.73)   50.83                70
 09/26/2019   16:13:50   (  68.78, -64.34) 09/26/2019   16:14:01  (  68.78, -64.34)    0.26                11
 09/26/2019   17:04:31   ( -68.67, 103.12) 09/26/2019   17:03:31  ( -68.68, 103.17)    2.26                60