Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 22.  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   02:33:21   ( -70.16, -38.84) 07/25/2021   02:34:33  ( -70.11, -38.57)   11.25                72
 07/25/2021   03:24:02   (  69.94, 128.82) 07/25/2021   03:24:01  (  69.96, 128.86)    2.62                 1
 07/25/2021   04:14:44   ( -69.84, -63.73) 07/25/2021   04:13:31  ( -69.84, -63.67)    2.27                73
 07/27/2021   18:49:45   ( -70.45,  76.65) 07/27/2021   18:50:56  ( -70.33,  77.63)   38.41                71
 07/27/2021   19:40:21   (  69.97,-115.29) 07/27/2021   19:40:28  (  69.95,-115.27)    1.71                 7
 07/27/2021   20:31:02   ( -69.82,  52.25) 07/27/2021   20:29:58  ( -69.84,  52.21)    3.11                64
 07/30/2021   11:06:09   ( -70.73,-167.88) 07/30/2021   11:07:17  ( -70.66,-166.01)   68.94                68
 07/30/2021   11:56:40   (  70.00,   0.61) 07/30/2021   11:56:54  (  70.00,   0.68)    2.76                14
 07/30/2021   12:47:21   ( -69.85, 168.15) 07/30/2021   12:46:25  ( -69.84, 168.08)    2.80                56
 08/02/2021   03:22:32   ( -71.03, -52.42) 08/02/2021   03:23:38  ( -70.93, -49.73)   98.28                66
 08/02/2021   04:12:57   (  69.98, 116.58) 08/02/2021   04:13:20  (  70.00, 116.55)    2.19                23
 08/02/2021   05:03:39   ( -69.88, -75.95) 08/02/2021   05:02:50  ( -69.89, -75.97)    1.71                49
 08/04/2021   20:29:16   (  70.02,-127.53) 08/04/2021   20:29:46  (  70.05,-127.51)    3.39                30
 08/04/2021   21:19:58   ( -69.91,  39.94) 08/04/2021   21:19:17  ( -69.89,  39.91)    2.98                41