Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 13.  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)
 04/14/2021   05:41:03   (  69.57,  94.37) 04/14/2021   05:41:47  (  69.57,  94.33)    1.85                44
 04/14/2021   06:31:45   ( -69.48, -98.18) 04/14/2021   06:31:17  ( -69.46, -98.19)    2.89                28
 04/16/2021   21:57:22   (  69.58,-149.71) 04/16/2021   21:58:13  (  69.59,-149.77)    2.84                51
 04/16/2021   22:48:04   ( -69.49,  17.73) 04/16/2021   22:47:43  ( -69.48,  17.72)    1.49                21
 04/16/2021   23:38:31   (  68.51,-173.60) 04/16/2021   23:37:24  (  68.60,-175.77)   88.96                67
 04/19/2021   14:13:42   (  69.59, -33.79) 04/19/2021   14:14:40  (  69.61, -33.87)    3.63                58
 04/19/2021   15:04:24   ( -69.51, 133.65) 04/19/2021   15:04:10  ( -69.50, 133.62)    1.33                14
 04/19/2021   15:54:56   (  68.79, -58.04) 04/19/2021   15:53:47  (  68.84, -59.60)   62.92                69
 04/22/2021   06:30:03   (  69.66,  82.05) 04/22/2021   06:31:06  (  69.68,  82.10)    2.99                63
 04/22/2021   07:20:44   ( -69.52,-110.43) 04/22/2021   07:20:37  ( -69.52,-110.48)    1.99                 7
 04/22/2021   08:11:20   (  69.02,  57.59) 04/22/2021   08:10:09  (  69.13,  56.65)   39.00                71
 04/24/2021   22:46:23   (  69.67,-162.04) 04/24/2021   22:47:33  (  69.68,-162.01)    1.53                70
 04/24/2021   23:37:04   ( -69.54,   5.48) 04/24/2021   23:37:04  ( -69.53,   5.41)    3.12                 0
 04/25/2021   00:27:45   (  69.30, 173.13) 04/25/2021   00:26:32  (  69.35, 172.82)   13.07                73