Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 6.  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)
 09/08/2021   16:51:56   ( -70.20, 106.79) 09/08/2021   16:52:48  ( -70.19, 106.76)    1.86                52
 09/08/2021   17:42:40   (  70.10, -85.75) 09/08/2021   17:42:15  (  70.08, -85.75)    2.24                25
 09/08/2021   18:33:06   ( -69.20,  82.91) 09/08/2021   18:31:58  ( -69.26,  80.76)   84.82                68
 09/11/2021   09:08:15   ( -70.25,-137.34) 09/11/2021   09:09:14  ( -70.24,-137.30)    2.56                59
 09/11/2021   09:58:58   (  70.10,  30.20) 09/11/2021   09:58:41  (  70.13,  30.19)    2.71                17
 09/11/2021   10:49:30   ( -69.52,-161.60) 09/11/2021   10:48:20  ( -69.52,-163.01)   54.60                70
 09/14/2021   01:24:33   ( -70.25, -21.40) 09/14/2021   01:25:40  ( -70.28, -21.36)    3.04                67
 09/14/2021   02:15:17   (  70.16, 146.06) 09/14/2021   02:15:07  (  70.17, 146.13)    2.60                10
 09/14/2021   03:05:53   ( -69.79, -46.05) 09/14/2021   03:04:41  ( -69.84, -46.70)   25.62                72
 09/16/2021   17:40:54   ( -70.42,  94.29) 09/16/2021   17:42:05  ( -70.37,  94.65)   14.29                71
 09/16/2021   18:31:35   (  70.16, -98.00) 09/16/2021   18:31:34  (  70.15, -98.03)    2.06                 1
 09/16/2021   19:22:16   ( -70.05,  69.49) 09/16/2021   19:21:04  ( -70.04,  69.46)    1.63                72
 09/19/2021   09:57:16   ( -70.68,-150.19) 09/19/2021   09:58:27  ( -70.56,-149.18)   39.36                71
 09/19/2021   10:47:52   (  70.16,  17.94) 09/19/2021   10:47:59  (  70.17,  17.89)    2.17                 7
 09/19/2021   11:38:33   ( -70.06,-174.57) 09/19/2021   11:37:29  ( -70.07,-174.62)    2.60                64