Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 31.  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)
 04/03/2021   11:45:13   ( -70.29,-177.77) 04/03/2021   11:46:21  ( -70.19,-175.97)   68.77                68
 04/03/2021   12:35:43   (  69.49,  -9.25) 04/03/2021   12:35:59  (  69.48,  -9.30)    2.44                16
 04/03/2021   13:26:25   ( -69.39, 158.20) 04/03/2021   13:25:29  ( -69.36, 158.18)    3.34                56
 04/06/2021   04:01:38   ( -70.55, -62.26) 04/06/2021   04:02:44  ( -70.45, -59.71)   95.22                66
 04/06/2021   04:52:04   (  69.54, 106.60) 04/06/2021   04:52:26  (  69.52, 106.63)    2.73                22
 04/06/2021   05:42:44   ( -69.39, -85.86) 04/06/2021   05:41:55  ( -69.41, -85.88)    2.02                49
 04/08/2021   21:08:23   (  69.55,-137.47) 04/08/2021   21:08:52  (  69.56,-137.44)    1.59                29
 04/08/2021   21:59:05   ( -69.45,  29.99) 04/08/2021   21:58:22  ( -69.45,  30.05)    2.17                43
 04/11/2021   13:24:43   (  69.55, -21.54) 04/11/2021   13:25:20  (  69.54, -21.60)    2.80                37
 04/11/2021   14:15:25   ( -69.45, 145.92) 04/11/2021   14:14:50  ( -69.43, 145.90)    2.35                35
 04/14/2021   05:41:03   (  69.55,  94.39) 04/14/2021   05:41:47  (  69.56,  94.32)    3.11                44
 04/14/2021   06:31:45   ( -69.46, -98.15) 04/14/2021   06:31:17  ( -69.46, -98.18)    1.59                28