Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 2.  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)
 12/03/2021   06:20:08   ( -70.59, -95.15) 12/03/2021   06:20:34  ( -70.59, -95.12)    1.35                26
 12/03/2021   07:10:53   (  70.47,  72.35) 12/03/2021   07:10:01  (  70.49,  72.38)    2.72                52
 12/05/2021   20:56:46   ( -71.27,  44.61) 12/05/2021   20:57:55  ( -71.18,  46.39)   64.68                69
 12/05/2021   21:47:20   (  70.59,-146.93) 12/05/2021   21:47:31  (  70.59,-146.87)    2.32                11
 12/05/2021   22:38:02   ( -70.47,  20.58) 12/05/2021   22:37:01  ( -70.47,  20.59)    0.83                61
 12/08/2021   12:23:49   (  70.81,  -6.38) 12/08/2021   12:25:00  (  70.74,  -6.04)   14.84                71
 12/08/2021   13:14:29   ( -70.58, 161.31) 12/08/2021   13:14:31  ( -70.57, 161.34)    1.35                 2
 12/08/2021   14:05:12   (  70.37, -31.04) 12/08/2021   14:03:59  (  70.41, -31.25)    9.40                73
 12/11/2021   03:50:55   ( -70.64, -57.88) 12/11/2021   03:52:01  ( -70.66, -57.93)    2.54                66
 12/11/2021   04:41:40   (  70.54, 109.59) 12/11/2021   04:41:28  (  70.55, 109.56)    1.52                12
 12/11/2021   05:32:15   ( -70.04, -82.30) 12/11/2021   05:31:04  ( -70.11, -83.45)   44.07                71
 12/13/2021   19:18:06   (  70.67,-109.70) 12/13/2021   19:18:56  (  70.68,-109.64)    2.76                50
 12/13/2021   20:08:49   ( -70.58,  57.76) 12/13/2021   20:08:26  ( -70.57,  57.83)    2.65                23