Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 11.  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)
 12/11/2021   04:41:40   (  70.55, 109.58) 12/11/2021   04:41:28  (  70.54, 109.53)    2.19                12
 12/11/2021   05:32:15   ( -70.05, -82.33) 12/11/2021   05:31:04  ( -70.08, -83.49)   44.17                71
 12/13/2021   19:18:07   (  70.67,-109.71) 12/13/2021   19:18:57  (  70.67,-109.66)    1.84                50
 12/13/2021   20:08:49   ( -70.53,  57.83) 12/13/2021   20:08:27  ( -70.55,  57.80)    2.43                22
 12/16/2021   10:45:16   ( -70.65,-161.45) 12/16/2021   10:45:57  ( -70.64,-161.48)    2.19                41
 12/16/2021   11:36:01   (  70.56,   6.01) 12/16/2021   11:35:24  (  70.53,   6.01)    3.33                37
 12/19/2021   02:12:26   (  70.64, 146.80) 12/19/2021   02:12:52  (  70.66, 146.81)    2.49                26
 12/19/2021   03:03:09   ( -70.54, -45.72) 12/19/2021   03:02:22  ( -70.55, -45.73)    0.99                47
 12/21/2021   16:49:04   (  71.34, -73.48) 12/21/2021   16:50:12  (  71.27, -71.64)   66.15                68
 12/21/2021   17:39:36   ( -70.66,  94.99) 12/21/2021   17:39:51  ( -70.67,  95.06)    2.99                15
 12/21/2021   18:30:20   (  70.53, -97.49) 12/21/2021   18:29:19  (  70.51, -97.54)    3.34                61
 12/24/2021   08:16:07   ( -70.99,-124.65) 12/24/2021   08:17:18  ( -70.90,-123.98)   26.39                71
 12/24/2021   09:06:46   (  70.61,  43.29) 12/24/2021   09:06:48  (  70.62,  43.24)    2.10                 2
 12/24/2021   09:57:29   ( -70.50,-149.21) 12/24/2021   09:56:18  ( -70.52,-149.28)    3.24                71