Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 8.  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   16:51:57   ( -70.23, 106.74) 09/08/2021   16:52:48  ( -70.21, 106.79)    2.98                51
 09/08/2021   17:42:40   (  70.08, -85.71) 09/08/2021   17:42:15  (  70.11, -85.71)    2.95                25
 09/08/2021   18:33:06   ( -69.18,  82.94) 09/08/2021   18:31:59  ( -69.22,  80.72)   87.74                67
 09/11/2021   09:08:15   ( -70.23,-137.31) 09/11/2021   09:09:14  ( -70.26,-137.27)    3.06                59
 09/11/2021   09:58:59   (  70.14,  30.15) 09/11/2021   09:58:41  (  70.15,  30.23)    3.36                18
 09/11/2021   10:49:30   ( -69.50,-161.57) 09/11/2021   10:48:20  ( -69.54,-162.98)   54.86                70
 09/14/2021   01:24:33   ( -70.24, -21.37) 09/14/2021   01:25:41  ( -70.24, -21.41)    1.58                68
 09/14/2021   02:15:16   (  70.14, 146.09) 09/14/2021   02:15:07  (  70.13, 146.08)    0.88                 9
 09/14/2021   03:05:52   ( -69.77, -46.02) 09/14/2021   03:04:40  ( -69.86, -46.67)   26.90                72
 09/16/2021   17:40:53   ( -70.40,  94.32) 09/16/2021   17:42:05  ( -70.33,  94.59)   12.91                72
 09/16/2021   18:31:34   (  70.15, -97.97) 09/16/2021   18:31:33  (  70.16, -98.00)    2.38                 1
 09/16/2021   19:22:15   ( -70.04,  69.52) 09/16/2021   19:21:03  ( -70.06,  69.48)    2.62                72
 09/19/2021   09:57:16   ( -70.67,-150.17) 09/19/2021   09:58:27  ( -70.58,-149.17)   38.49                71
 09/19/2021   10:47:53   (  70.21,  17.88) 09/19/2021   10:47:59  (  70.19,  17.91)    2.19                 6
 09/19/2021   11:38:34   ( -70.10,-174.63) 09/19/2021   11:37:29  ( -70.09,-174.60)    1.75                65
 09/22/2021   02:13:40   ( -70.99, -34.76) 09/22/2021   02:14:48  ( -70.87, -32.84)   71.01                68
 09/22/2021   03:04:11   (  70.22, 133.81) 09/22/2021   03:04:25  (  70.21, 133.82)    0.86                14