Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 12.  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)
 07/14/2021   09:28:04   ( -69.93,-142.27) 07/14/2021   09:28:53  ( -69.94,-142.33)    2.73                49
 07/14/2021   10:18:48   (  69.86,  25.15) 07/14/2021   10:18:20  (  69.84,  25.16)    3.09                28
 07/14/2021   11:09:12   ( -68.82,-166.04) 07/14/2021   11:08:06  ( -68.84,-168.51)   99.35                66
 07/17/2021   01:44:23   ( -70.00, -26.43) 07/17/2021   01:45:17  ( -69.99, -26.39)    2.41                54
 07/17/2021   02:35:06   (  69.89, 141.06) 07/17/2021   02:34:44  (  69.88, 141.10)    1.95                22
 07/17/2021   03:25:34   ( -69.05, -50.41) 07/17/2021   03:24:26  ( -69.10, -52.29)   74.83                68
 07/19/2021   18:00:42   ( -70.02,  89.49) 07/19/2021   18:01:42  ( -70.02,  89.55)    2.43                60
 07/19/2021   18:51:25   (  69.91,-103.03) 07/19/2021   18:51:09  (  69.91,-102.96)    2.62                16
 07/19/2021   19:41:57   ( -69.28,  65.20) 07/19/2021   19:40:47  ( -69.36,  63.93)   50.85                70
 07/22/2021   10:17:00   ( -69.99,-154.52) 07/22/2021   10:18:08  ( -70.00,-154.60)    3.35                68
 07/22/2021   11:07:43   (  69.88,  12.95) 07/22/2021   11:07:35  (  69.89,  12.88)    2.63                 8
 07/22/2021   11:58:21   ( -69.57,-179.27) 07/22/2021   11:57:08  ( -69.62,-179.85)   23.30                73
 07/25/2021   02:33:21   ( -70.11, -38.77) 07/25/2021   02:34:32  ( -70.08, -38.60)    7.41                71
 07/25/2021   03:24:02   (  69.91, 128.86) 07/25/2021   03:24:00  (  69.91, 128.80)    2.02                 2
 07/25/2021   04:14:43   ( -69.75, -63.59) 07/25/2021   04:13:31  ( -69.75, -63.78)    7.38                72