Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 24.  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)
 07/25/2021   02:33:22   ( -70.18, -38.87) 07/25/2021   02:34:33  ( -70.14, -38.52)   13.70                71
 07/25/2021   03:24:03   (  69.96, 128.79) 07/25/2021   03:24:02  (  69.93, 128.82)    3.15                 1
 07/25/2021   04:14:43   ( -69.82, -63.68) 07/25/2021   04:13:31  ( -69.82, -63.71)    0.86                72
 07/27/2021   18:49:45   ( -70.47,  76.62) 07/27/2021   18:50:55  ( -70.36,  77.66)   40.84                70
 07/27/2021   19:40:20   (  69.93,-115.24) 07/27/2021   19:40:28  (  69.92,-115.31)    3.16                 8
 07/27/2021   20:31:02   ( -69.84,  52.22) 07/27/2021   20:29:57  ( -69.86,  52.24)    2.67                65
 07/30/2021   11:06:08   ( -70.71,-167.83) 07/30/2021   11:07:17  ( -70.62,-166.07)   65.21                69
 07/30/2021   11:56:39   (  69.97,   0.66) 07/30/2021   11:56:54  (  69.96,   0.62)    1.35                15
 07/30/2021   12:47:21   ( -69.87, 168.12) 07/30/2021   12:46:24  ( -69.85, 168.10)    1.95                57
 08/02/2021   03:22:32   ( -71.00, -52.37) 08/02/2021   03:23:38  ( -70.93, -49.72)   96.25                66
 08/02/2021   04:12:58   (  70.00, 116.55) 08/02/2021   04:13:20  (  70.00, 116.55)    0.29                22
 08/02/2021   05:03:40   ( -69.90, -75.98) 08/02/2021   05:02:50  ( -69.89, -75.96)    1.20                50
 08/04/2021   20:29:16   (  70.04,-127.56) 08/04/2021   20:29:45  (  70.03,-127.53)    1.67                29
 08/04/2021   21:19:58   ( -69.93,  39.91) 08/04/2021   21:19:15  ( -69.93,  39.96)    2.17                43