Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 5.  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)
 12/05/2021   20:56:47   ( -71.31,  44.55) 12/05/2021   20:57:55  ( -71.19,  46.41)   67.79                68
 12/05/2021   21:47:20   (  70.57,-146.90) 12/05/2021   21:47:32  (  70.55,-146.93)    1.93                12
 12/05/2021   22:38:03   ( -70.50,  20.53) 12/05/2021   22:37:01  ( -70.48,  20.61)    3.54                62
 12/08/2021   12:23:49   (  70.78,  -6.34) 12/08/2021   12:25:00  (  70.76,  -6.02)   12.18                71
 12/08/2021   13:14:29   ( -70.55, 161.35) 12/08/2021   13:14:31  ( -70.58, 161.35)    3.06                 2
 12/08/2021   14:05:12   (  70.34, -31.00) 12/08/2021   14:04:00  (  70.37, -31.31)   12.34                72
 12/11/2021   03:50:55   ( -70.66, -57.91) 12/11/2021   03:52:00  ( -70.67, -57.91)    1.31                65
 12/11/2021   04:41:40   (  70.56, 109.56) 12/11/2021   04:41:27  (  70.57, 109.58)    1.33                13
 12/11/2021   05:32:14   ( -70.01, -82.25) 12/11/2021   05:31:04  ( -70.07, -83.51)   48.16                70
 12/13/2021   19:18:07   (  70.67,-109.71) 12/13/2021   19:18:57  (  70.65,-109.69)    2.86                50
 12/13/2021   20:08:49   ( -70.53,  57.83) 12/13/2021   20:08:27  ( -70.54,  57.77)    2.24                22
 12/16/2021   10:45:16   ( -70.64,-161.43) 12/16/2021   10:45:56  ( -70.67,-161.43)    2.75                40
 12/16/2021   11:36:01   (  70.56,   6.02) 12/16/2021   11:35:23  (  70.56,   6.05)    1.29                38
 12/19/2021   02:12:27   (  70.62, 146.83) 12/19/2021   02:12:53  (  70.62, 146.76)    2.54                26