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   02:33:21   ( -70.17, -38.86) 07/25/2021   02:34:33  ( -70.10, -38.59)   13.10                72
 07/25/2021   03:24:02   (  69.95, 128.80) 07/25/2021   03:24:01  (  69.94, 128.83)    1.49                 1
 07/25/2021   04:14:43   ( -69.81, -63.67) 07/25/2021   04:13:31  ( -69.82, -63.70)    2.00                72
 07/27/2021   18:49:45   ( -70.46,  76.64) 07/27/2021   18:50:55  ( -70.36,  77.67)   39.92                70
 07/27/2021   19:40:21   (  69.97,-115.30) 07/27/2021   19:40:27  (  69.99,-115.23)    3.01                 6
 07/27/2021   20:31:02   ( -69.83,  52.24) 07/27/2021   20:29:58  ( -69.82,  52.17)    2.92                64
 07/30/2021   11:06:09   ( -70.74,-167.89) 07/30/2021   11:07:17  ( -70.62,-166.07)   68.18                68
 07/30/2021   11:56:39   (  69.95,   0.68) 07/30/2021   11:56:54  (  69.97,   0.63)    2.97                15
 07/30/2021   12:47:21   ( -69.85, 168.15) 07/30/2021   12:46:24  ( -69.86, 168.11)    1.44                57
 08/02/2021   03:22:33   ( -71.03, -52.42) 08/02/2021   03:23:39  ( -70.88, -49.80)   96.52                66
 08/02/2021   04:12:58   (  69.98, 116.58) 08/02/2021   04:13:20  (  70.00, 116.56)    2.95                22
 08/02/2021   05:03:40   ( -69.88, -75.95) 08/02/2021   05:02:50  ( -69.90, -75.96)    1.91                50
 08/04/2021   20:29:16   (  70.01,-127.52) 08/04/2021   20:29:45  (  70.03,-127.52)    2.66                29
 08/04/2021   21:19:58   ( -69.91,  39.95) 08/04/2021   21:19:15  ( -69.93,  39.96)    2.37                43
 08/07/2021   12:45:35   (  70.04, -11.62) 08/07/2021   12:46:11  (  70.06, -11.61)    1.87                36
 08/07/2021   13:36:17   ( -69.94, 155.85) 08/07/2021   13:35:41  ( -69.95, 155.88)    2.20                36