Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 2.  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)
 09/03/2021   08:19:21   ( -70.18,-125.07) 09/03/2021   08:19:55  ( -70.19,-124.99)    3.13                34
 09/03/2021   09:10:04   (  70.04,  42.46) 09/03/2021   09:09:23  (  70.03,  42.43)    1.36                41
 09/06/2021   00:35:38   ( -70.18,  -9.12) 09/06/2021   00:36:20  ( -70.17,  -9.14)    1.45                42
 09/06/2021   01:26:22   (  70.09, 158.33) 09/06/2021   01:25:47  (  70.06, 158.35)    3.21                35
 09/08/2021   16:51:56   ( -70.18, 106.83) 09/08/2021   16:52:45  ( -70.19, 106.78)    2.59                49
 09/08/2021   17:42:40   (  70.09, -85.72) 09/08/2021   17:42:12  (  70.08, -85.73)    0.70                28
 09/11/2021   09:08:15   ( -70.23,-137.31) 09/11/2021   09:09:10  ( -70.21,-137.31)    1.94                55
 09/11/2021   09:58:58   (  70.09,  30.22) 09/11/2021   09:58:37  (  70.10,  30.17)    2.28                21
 09/11/2021   10:49:27   ( -69.34,-161.34) 09/11/2021   10:48:18  ( -69.39,-163.17)   71.65                69
 09/14/2021   01:24:33   ( -70.23, -21.37) 09/14/2021   01:25:35  ( -70.23, -21.40)    1.45                62
 09/14/2021   02:15:17   (  70.14, 146.08) 09/14/2021   02:15:02  (  70.11, 146.07)    3.60                15
 09/14/2021   03:05:49   ( -69.55, -45.71) 09/14/2021   03:04:39  ( -69.62, -46.97)   49.43                70