Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 4 21.  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)
 04/21/2019   14:22:06   (  68.85, -36.29) 04/21/2019   14:22:57  (  68.88, -36.33)    2.95                51
 04/21/2019   15:12:47   ( -68.75, 131.17) 04/21/2019   15:12:27  ( -68.76, 131.15)    1.00                20
 04/21/2019   16:03:16   (  67.82, -60.33) 04/21/2019   16:02:08  (  67.88, -62.26)   80.91                68
 04/24/2019   06:38:34   (  68.87,  79.57) 04/24/2019   06:39:27  (  68.86,  79.53)    2.05                53
 04/24/2019   07:29:15   ( -68.76,-112.97) 04/24/2019   07:28:57  ( -68.74,-112.99)    2.72                18
 04/24/2019   08:19:45   (  67.89,  55.46) 04/24/2019   08:18:37  (  67.92,  53.66)   75.28                68
 04/26/2019   22:55:02   (  68.89,-164.58) 04/26/2019   22:55:56  (  68.90,-164.55)    1.52                54
 04/26/2019   23:45:43   ( -68.78,   2.89) 04/26/2019   23:45:26  ( -68.78,   2.94)    2.07                17
 04/27/2019   00:36:14   (  67.96, 171.25) 04/27/2019   00:35:05  (  68.01, 169.65)   67.06                69
 04/29/2019   15:11:30   (  68.91, -48.72) 04/29/2019   15:12:26  (  68.88, -48.70)    3.03                56
 04/29/2019   16:02:10   ( -68.75, 118.81) 04/29/2019   16:01:56  ( -68.77, 118.80)    2.67                14
 04/29/2019   16:52:43   (  68.04, -72.96) 04/29/2019   16:51:33  (  68.11, -74.36)   58.84                70
 05/02/2019   07:27:56   (  68.87,  67.20) 05/02/2019   07:28:55  (  68.87,  67.16)    1.89                59
 05/02/2019   08:18:37   ( -68.77,-125.33) 05/02/2019   08:18:25  ( -68.76,-125.34)    1.04                12
 05/02/2019   09:09:11   (  68.11,  42.83) 05/02/2019   09:08:01  (  68.15,  41.56)   52.65                70
 05/04/2019   23:44:24   (  68.90,-176.95) 05/04/2019   23:45:24  (  68.91,-176.91)    1.92                60
 05/05/2019   00:35:05   ( -68.79,  -9.48) 05/05/2019   00:34:54  ( -68.80,  -9.41)    3.18                11
 05/05/2019   01:25:40   (  68.19, 158.61) 05/05/2019   01:24:29  (  68.24, 157.55)   44.15                71