Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 27.  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)
 07/27/2021   18:49:45   ( -70.45,  76.64) 07/27/2021   18:50:56  ( -70.31,  77.60)   38.81                71
 07/27/2021   19:40:21   (  69.97,-115.29) 07/27/2021   19:40:28  (  69.94,-115.29)    3.30                 7
 07/27/2021   20:31:02   ( -69.83,  52.25) 07/27/2021   20:29:58  ( -69.82,  52.18)    2.60                64
 07/30/2021   11:06:09   ( -70.74,-167.88) 07/30/2021   11:07:17  ( -70.63,-166.06)   67.94                68
 07/30/2021   11:56:40   (  70.00,   0.61) 07/30/2021   11:56:54  (  69.98,   0.64)    2.15                14
 07/30/2021   12:47:21   ( -69.85, 168.15) 07/30/2021   12:46:24  ( -69.87, 168.12)    2.23                57
 08/02/2021   03:22:33   ( -71.02, -52.41) 08/02/2021   03:23:39  ( -70.89, -49.79)   96.26                66
 08/02/2021   04:12:58   (  70.02, 116.51) 08/02/2021   04:13:19  (  70.01, 116.57)    2.41                21
 08/02/2021   05:03:39   ( -69.87, -75.94) 08/02/2021   05:02:49  ( -69.90, -75.95)    3.32                50
 08/04/2021   20:29:17   (  70.05,-127.59) 08/04/2021   20:29:45  (  70.04,-127.51)    3.13                28
 08/04/2021   21:19:58   ( -69.90,  39.96) 08/04/2021   21:19:16  ( -69.88,  39.90)    3.24                42
 08/07/2021   12:45:35   (  70.03, -11.61) 08/07/2021   12:46:12  (  70.01, -11.67)    3.05                37
 08/07/2021   13:36:17   ( -69.93, 155.87) 08/07/2021   13:35:42  ( -69.91, 155.81)    2.87                35