Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 19.  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)
 03/21/2021   02:23:19   ( -69.52, -36.28) 03/21/2021   02:24:19  ( -69.52, -36.28)    0.24                60
 03/21/2021   03:14:02   (  69.40, 131.20) 03/21/2021   03:13:46  (  69.42, 131.22)    1.78                16
 03/21/2021   04:04:34   ( -68.78, -60.61) 03/21/2021   04:03:24  ( -68.86, -61.86)   51.21                70
 03/23/2021   18:39:39   ( -69.51,  79.66) 03/23/2021   18:40:46  ( -69.52,  79.59)    2.87                67
 03/23/2021   19:30:22   (  69.40,-112.86) 03/23/2021   19:30:13  (  69.41,-112.91)    2.27                 9
 03/23/2021   20:20:59   ( -69.04,  54.97) 03/23/2021   20:19:47  ( -69.08,  54.29)   27.32                72
 03/26/2021   10:56:00   ( -69.56,-164.47) 03/26/2021   10:57:12  ( -69.56,-164.47)    0.10                72
 03/26/2021   11:46:43   (  69.45,   3.00) 03/26/2021   11:46:39  (  69.45,   3.03)    0.93                 4
 03/26/2021   12:37:23   ( -69.24, 170.61) 03/26/2021   12:36:10  ( -69.29, 170.45)    8.10                73
 03/29/2021   03:12:24   ( -69.77, -48.85) 03/29/2021   03:13:36  ( -69.71, -48.39)   18.89                72
 03/29/2021   04:03:03   (  69.45, 118.94) 03/29/2021   04:03:06  (  69.43, 118.88)    3.24                 3
 03/29/2021   04:53:45   ( -69.35, -73.60) 03/29/2021   04:52:36  ( -69.32, -73.62)    2.68                69
 03/31/2021   19:28:48   ( -70.03,  66.69) 03/31/2021   19:29:58  ( -69.91,  67.77)   43.33                70
 03/31/2021   20:19:22   (  69.45,-125.13) 03/31/2021   20:19:31  (  69.46,-125.20)    2.60                 9
 03/31/2021   21:10:04   ( -69.35,  42.33) 03/31/2021   21:09:01  ( -69.36,  42.30)    1.78                63