Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 9 17.  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)
 09/18/2019   14:33:47   ( -68.90, 140.53) 09/18/2019   14:34:48  ( -68.88, 140.60)    3.20                61
 09/18/2019   15:24:30   (  68.71, -51.91) 09/18/2019   15:24:16  (  68.72, -51.96)    1.89                14
 09/18/2019   16:15:03   ( -68.19, 116.08) 09/18/2019   16:13:52  ( -68.28, 115.14)   40.21                71
 09/21/2019   06:50:13   ( -68.87,-103.55) 09/21/2019   06:51:18  ( -68.86,-103.56)    2.16                65
 09/21/2019   07:40:57   (  68.75,  63.93) 09/21/2019   07:40:45  (  68.74,  63.95)    1.08                12
 09/21/2019   08:31:32   ( -68.33,-128.21) 09/21/2019   08:30:20  ( -68.36,-128.89)   28.16                72
 09/23/2019   23:06:39   ( -68.86,  12.36) 09/23/2019   23:07:47  ( -68.89,  12.35)    3.33                68
 09/23/2019   23:57:22   (  68.73, 179.83) 09/23/2019   23:57:14  (  68.72, 179.79)    2.78                 8
 09/24/2019   00:47:59   ( -68.42, -12.43) 09/24/2019   00:46:46  ( -68.50, -12.84)   19.08                73
 09/26/2019   15:23:05   ( -68.89, 128.20) 09/26/2019   15:24:16  ( -68.86, 128.20)    3.33                71
 09/26/2019   16:13:48   (  68.72, -64.26) 09/26/2019   16:13:43  (  68.74, -64.30)    3.10                 5
 09/26/2019   17:04:27   ( -68.51, 103.34) 09/26/2019   17:03:15  ( -68.53, 103.07)   11.31                72
 09/29/2019   07:39:33   ( -68.98,-116.03) 09/29/2019   07:40:44  ( -68.95,-115.82)    9.37                71
 09/29/2019   08:30:15   (  68.76,  51.57) 09/29/2019   08:30:12  (  68.78,  51.61)    2.01                 3
 09/29/2019   09:20:55   ( -68.60,-140.89) 09/29/2019   09:19:43  ( -68.62,-140.95)    3.28                72