Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 19.  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)
 07/19/2021   18:00:42   ( -70.00,  89.52) 07/19/2021   18:01:43  ( -70.00,  89.52)    0.27                61
 07/19/2021   18:51:25   (  69.88,-102.98) 07/19/2021   18:51:10  (  69.90,-102.98)    2.17                15
 07/19/2021   19:41:58   ( -69.32,  65.16) 07/19/2021   19:40:47  ( -69.40,  63.97)   47.53                71
 07/22/2021   10:17:00   ( -70.02,-154.57) 07/22/2021   10:18:07  ( -70.04,-154.55)    2.15                67
 07/22/2021   11:07:43   (  69.90,  12.92) 07/22/2021   11:07:34  (  69.93,  12.95)    3.18                 9
 07/22/2021   11:58:20   ( -69.55,-179.23) 07/22/2021   11:57:08  ( -69.60,-179.88)   25.59                72
 07/25/2021   02:33:20   ( -70.10, -38.74) 07/25/2021   02:34:32  ( -70.07, -38.62)    5.33                72
 07/25/2021   03:24:02   (  69.93, 128.82) 07/25/2021   03:24:00  (  69.91, 128.79)    3.02                 2
 07/25/2021   04:14:43   ( -69.78, -63.64) 07/25/2021   04:13:30  ( -69.80, -63.72)    3.68                73
 07/27/2021   18:49:43   ( -70.33,  76.83) 07/27/2021   18:50:55  ( -70.21,  77.46)   27.03                72
 07/27/2021   19:40:21   (  69.96,-115.28) 07/27/2021   19:40:25  (  69.93,-115.29)    3.17                 4
 07/27/2021   20:31:02   ( -69.81,  52.27) 07/27/2021   20:29:55  ( -69.83,  52.20)    3.34                67
 07/30/2021   11:06:06   ( -70.57,-167.60) 07/30/2021   11:07:16  ( -70.45,-166.30)   49.79                70
 07/30/2021   11:56:39   (  69.94,   0.70) 07/30/2021   11:56:50  (  69.96,   0.63)    3.17                11
 07/30/2021   12:47:21   ( -69.83, 168.17) 07/30/2021   12:46:20  ( -69.85, 168.12)    2.76                61