Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 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)
 09/19/2021   09:57:16   ( -70.68,-150.18) 09/19/2021   09:58:27  ( -70.57,-149.18)   38.78                71
 09/19/2021   10:47:53   (  70.20,  17.89) 09/19/2021   10:47:59  (  70.19,  17.92)    1.60                 6
 09/19/2021   11:38:34   ( -70.11,-174.64) 09/19/2021   11:37:29  ( -70.08,-174.61)    3.09                65
 09/22/2021   02:13:40   ( -71.00, -34.77) 09/22/2021   02:14:48  ( -70.87, -32.85)   71.08                68
 09/22/2021   03:04:11   (  70.21, 133.82) 09/22/2021   03:04:25  (  70.22, 133.83)    0.52                14
 09/22/2021   03:54:52   ( -70.11, -58.70) 09/22/2021   03:53:55  ( -70.11, -58.70)    0.84                57
 09/24/2021   18:30:03   ( -71.26,  80.71) 09/24/2021   18:31:09  ( -71.16,  83.48)   99.78                66
 09/24/2021   19:20:29   (  70.22,-110.25) 09/24/2021   19:20:51  (  70.23,-110.27)    1.57                22
 09/24/2021   20:11:10   ( -70.12,  57.23) 09/24/2021   20:10:21  ( -70.13,  57.21)    0.91                49
 09/27/2021   11:36:46   (  70.23,   5.68) 09/27/2021   11:37:16  (  70.25,   5.63)    2.45                30
 09/27/2021   12:27:27   ( -70.13, 173.16) 09/27/2021   12:26:46  ( -70.14, 173.11)    2.16                41
 09/30/2021   03:53:05   (  70.30, 121.52) 09/30/2021   03:53:41  (  70.31, 121.60)    3.07                36
 09/30/2021   04:43:45   ( -70.15, -70.91) 09/30/2021   04:43:12  ( -70.15, -70.99)    3.22                33