Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 30.  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)
 08/31/2021   16:03:02   ( -70.14, 119.04) 08/31/2021   16:03:30  ( -70.13, 119.05)    1.18                28
 08/31/2021   16:53:45   (  70.01, -73.44) 08/31/2021   16:52:57  (  70.03, -73.45)    2.78                48
 09/03/2021   08:19:20   ( -70.14,-125.01) 09/03/2021   08:19:55  ( -70.17,-125.02)    2.93                35
 09/03/2021   09:10:04   (  70.05,  42.44) 09/03/2021   09:09:22  (  70.06,  42.47)    1.31                42
 09/06/2021   00:35:39   ( -70.19,  -9.14) 09/06/2021   00:36:20  ( -70.19,  -9.11)    1.10                41
 09/06/2021   01:26:22   (  70.05, 158.39) 09/06/2021   01:25:47  (  70.08, 158.38)    3.02                35
 09/08/2021   16:51:56   ( -70.19, 106.81) 09/08/2021   16:52:44  ( -70.20, 106.80)    1.75                48
 09/08/2021   17:42:40   (  70.10, -85.74) 09/08/2021   17:42:11  (  70.09, -85.72)    1.62                29
 09/11/2021   09:08:14   ( -70.19,-137.24) 09/11/2021   09:09:09  ( -70.21,-137.31)    3.45                55
 09/11/2021   09:58:58   (  70.10,  30.20) 09/11/2021   09:58:36  (  70.09,  30.17)    1.75                22