Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 6.  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)
 12/08/2021   12:23:49   (  70.79,  -6.35) 12/08/2021   12:25:00  (  70.75,  -6.03)   12.62                71
 12/08/2021   13:14:29   ( -70.56, 161.34) 12/08/2021   13:14:31  ( -70.58, 161.35)    1.70                 2
 12/08/2021   14:05:12   (  70.34, -31.01) 12/08/2021   14:04:00  (  70.37, -31.32)   11.94                72
 12/11/2021   03:50:56   ( -70.67, -57.92) 12/11/2021   03:52:01  ( -70.67, -57.92)    0.31                65
 12/11/2021   04:41:41   (  70.56, 109.55) 12/11/2021   04:41:28  (  70.56, 109.57)    0.80                13
 12/11/2021   05:32:15   ( -70.01, -82.26) 12/11/2021   05:31:05  ( -70.06, -83.52)   47.87                70
 12/13/2021   19:18:06   (  70.63,-109.64) 12/13/2021   19:18:57  (  70.64,-109.70)    2.81                51
 12/13/2021   20:08:49   ( -70.54,  57.82) 12/13/2021   20:08:27  ( -70.53,  57.76)    2.64                22
 12/16/2021   10:45:16   ( -70.65,-161.45) 12/16/2021   10:45:56  ( -70.66,-161.44)    0.65                40
 12/16/2021   11:36:01   (  70.56,   6.00) 12/16/2021   11:35:23  (  70.55,   6.04)    2.25                38
 12/19/2021   02:12:27   (  70.63, 146.81) 12/19/2021   02:12:53  (  70.61, 146.74)    3.27                26
 12/19/2021   03:03:10   ( -70.53, -45.71) 12/19/2021   03:02:22  ( -70.56, -45.71)    3.43                48