Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 9.  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)
 09/11/2021   09:08:15   ( -70.24,-137.32) 09/11/2021   09:09:14  ( -70.25,-137.28)    2.16                59
 09/11/2021   09:58:59   (  70.14,  30.14) 09/11/2021   09:58:41  (  70.15,  30.22)    2.99                18
 09/11/2021   10:49:30   ( -69.51,-161.58) 09/11/2021   10:48:20  ( -69.54,-162.99)   54.79                70
 09/14/2021   01:24:33   ( -70.24, -21.38) 09/14/2021   01:25:41  ( -70.24, -21.42)    1.61                68
 09/14/2021   02:15:17   (  70.14, 146.09) 09/14/2021   02:15:08  (  70.13, 146.07)    1.60                 9
 09/14/2021   03:05:53   ( -69.77, -46.03) 09/14/2021   03:04:41  ( -69.86, -46.68)   26.54                72
 09/16/2021   17:40:53   ( -70.40,  94.31) 09/16/2021   17:42:05  ( -70.33,  94.59)   13.45                72
 09/16/2021   18:31:34   (  70.15, -97.97) 09/16/2021   18:31:33  (  70.16, -98.01)    1.86                 1
 09/16/2021   19:22:15   ( -70.04,  69.51) 09/16/2021   19:21:03  ( -70.05,  69.48)    1.89                72
 09/19/2021   09:57:16   ( -70.67,-150.18) 09/19/2021   09:58:27  ( -70.57,-149.17)   38.63                71
 09/19/2021   10:47:53   (  70.21,  17.88) 09/19/2021   10:47:59  (  70.19,  17.91)    2.61                 6
 09/19/2021   11:38:34   ( -70.10,-174.64) 09/19/2021   11:37:29  ( -70.08,-174.61)    2.34                65
 09/22/2021   02:13:40   ( -70.99, -34.77) 09/22/2021   02:14:48  ( -70.87, -32.85)   71.02                68
 09/22/2021   03:04:11   (  70.22, 133.81) 09/22/2021   03:04:25  (  70.21, 133.81)    1.19                14
 09/22/2021   03:54:52   ( -70.11, -58.70) 09/22/2021   03:53:55  ( -70.10, -58.70)    0.59                57