Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 8.  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   (  70.78,  -6.34) 12/08/2021   12:25:01  (  70.71,  -6.09)   11.82                72
 12/08/2021   13:14:29   ( -70.55, 161.35) 12/08/2021   13:14:32  ( -70.53, 161.28)    3.30                 3
 12/08/2021   14:05:11   (  70.33, -30.99) 12/08/2021   14:03:59  (  70.38, -31.30)   12.58                72
 12/11/2021   03:50:55   ( -70.66, -57.91) 12/11/2021   03:52:00  ( -70.68, -57.90)    1.95                65
 12/11/2021   04:41:40   (  70.56, 109.56) 12/11/2021   04:41:27  (  70.58, 109.60)    2.70                13
 12/11/2021   05:32:14   ( -70.01, -82.26) 12/11/2021   05:31:04  ( -70.08, -83.50)   47.63                70
 12/13/2021   19:18:07   (  70.68,-109.72) 12/13/2021   19:18:57  (  70.66,-109.68)    2.78                50
 12/13/2021   20:08:49   ( -70.54,  57.82) 12/13/2021   20:08:27  ( -70.55,  57.79)    1.24                22
 12/16/2021   10:45:16   ( -70.66,-161.46) 12/16/2021   10:45:56  ( -70.68,-161.41)    2.73                40
 12/16/2021   11:36:01   (  70.57,   5.99) 12/16/2021   11:35:23  (  70.57,   6.07)    2.88                38
 12/19/2021   02:12:27   (  70.64, 146.79) 12/19/2021   02:12:53  (  70.64, 146.78)    0.57                26
 12/19/2021   03:03:10   ( -70.54, -45.73) 12/19/2021   03:02:23  ( -70.53, -45.75)    1.52                47
 12/21/2021   16:49:04   (  71.35, -73.49) 12/21/2021   16:50:12  (  71.25, -71.67)   65.67                68
 12/21/2021   17:39:36   ( -70.66,  94.99) 12/21/2021   17:39:51  ( -70.65,  95.03)    2.35                15
 12/21/2021   18:30:20   (  70.54, -97.50) 12/21/2021   18:29:18  (  70.54, -97.49)    0.47                62