Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 11 20.  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)
 11/22/2021   16:31:39   ( -70.60, 111.90) 11/22/2021   16:32:40  ( -70.61, 111.96)    2.94                61
 11/22/2021   17:22:24   (  70.45, -80.56) 11/22/2021   17:22:08  (  70.46, -80.63)    2.67                16
 11/22/2021   18:12:56   ( -69.81,  87.74) 11/22/2021   18:11:47  ( -69.85,  86.14)   61.71                69
 11/25/2021   07:59:15   (  70.56,  60.07) 11/25/2021   07:59:39  (  70.54,  60.09)    2.30                24
 11/25/2021   08:49:57   ( -70.43,-132.41) 11/25/2021   08:49:09  ( -70.42,-132.45)    1.83                48
 11/27/2021   22:36:17   (  70.60,-159.24) 11/27/2021   22:37:10  (  70.61,-159.20)    1.53                53
 11/27/2021   23:27:00   ( -70.51,   8.22) 11/27/2021   23:26:40  ( -70.50,   8.26)    2.52                20
 11/30/2021   13:13:30   (  70.64, -18.59) 11/30/2021   13:14:41  (  70.62, -18.58)    2.04                71
 11/30/2021   14:04:13   ( -70.53, 148.90) 11/30/2021   14:04:11  ( -70.51, 148.89)    2.71                 2
 11/30/2021   14:54:53   (  70.11, -43.14) 11/30/2021   14:53:42  (  70.18, -43.95)   31.46                71
 12/03/2021   03:50:59   (  70.82, 121.77) 12/03/2021   03:52:11  (  70.73, 122.19)   18.15                72
 12/03/2021   04:41:39   ( -70.54, -70.46) 12/03/2021   04:41:42  ( -70.57, -70.42)    3.37                 3
 12/03/2021   05:32:23   (  70.33,  97.18) 12/03/2021   05:31:11  (  70.35,  96.90)   10.56                72