Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 11 18.  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)
 11/20/2021   01:04:27   (  70.71, 163.50) 11/20/2021   01:05:39  (  70.66, 163.79)   12.26                72
 11/20/2021   01:55:07   ( -70.50, -28.83) 11/20/2021   01:55:10  ( -70.48, -28.83)    1.67                 3
 11/20/2021   02:45:51   (  70.30, 138.79) 11/20/2021   02:44:38  (  70.33, 138.58)    8.57                73
 11/22/2021   16:31:58   ( -70.57, 111.86) 11/22/2021   16:32:41  ( -70.57, 111.89)    1.20                43
 11/22/2021   17:22:44   (  70.46, -80.67) 11/22/2021   17:22:08  (  70.47, -80.61)    2.17                36
 11/25/2021   07:09:05   ( -70.58,-107.42) 11/25/2021   07:10:13  ( -70.60,-107.47)    2.52                68
 11/25/2021   07:59:51   (  70.47,  60.06) 11/25/2021   07:59:40  (  70.49,  60.02)    2.44                11
 11/25/2021   08:50:27   ( -70.01,-131.91) 11/25/2021   08:49:16  ( -70.05,-132.98)   41.03                71
 11/27/2021   21:46:31   ( -70.74,  32.98) 11/27/2021   21:47:43  ( -70.67,  33.24)   12.99                72
 11/27/2021   22:37:15   (  70.53,-159.37) 11/27/2021   22:37:11  (  70.51,-159.35)    2.55                 4
 11/27/2021   23:27:55   ( -70.26,   8.37) 11/27/2021   23:26:42  ( -70.34,   8.04)   15.61                73
 11/30/2021   12:24:10   ( -70.65, 173.73) 11/30/2021   12:25:16  ( -70.63, 173.78)    3.16                66
 11/30/2021   13:14:56   (  70.53, -18.78) 11/30/2021   13:14:43  (  70.51, -18.74)    2.45                13