Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 11 1.  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)
 11/04/2021   00:15:34   ( -70.49,  -4.12) 11/04/2021   00:16:36  ( -70.49,  -4.08)    1.33                62
 11/04/2021   01:06:17   (  70.36, 163.41) 11/04/2021   01:06:03  (  70.39, 163.41)    3.17                14
 11/04/2021   01:56:50   ( -69.82, -28.43) 11/04/2021   01:55:40  ( -69.89, -29.67)   47.87                70
 11/06/2021   16:31:50   ( -70.49, 111.84) 11/06/2021   16:33:01  ( -70.52, 111.83)    2.57                71
 11/06/2021   17:22:34   (  70.42, -80.73) 11/06/2021   17:22:28  (  70.41, -80.68)    1.98                 6
 11/06/2021   18:13:13   ( -70.18,  86.96) 11/06/2021   18:11:59  ( -70.24,  86.71)   11.35                74
 11/09/2021   08:48:13   ( -70.81,-132.73) 11/09/2021   08:49:24  ( -70.70,-132.02)   28.53                71
 11/09/2021   09:38:51   (  70.43,  35.21) 11/09/2021   09:38:54  (  70.43,  35.22)    0.31                 3
 11/09/2021   10:29:32   ( -70.29,-157.26) 11/09/2021   10:28:24  ( -70.32,-157.31)    3.30                68
 11/12/2021   01:04:36   ( -71.12, -17.31) 11/12/2021   01:05:45  ( -70.98, -15.72)   59.78                69
 11/12/2021   01:55:08   (  70.44, 151.15) 11/12/2021   01:55:20  (  70.43, 151.10)    1.70                12
 11/12/2021   02:45:50   ( -70.35, -41.39) 11/12/2021   02:44:50  ( -70.32, -41.42)    3.01                60
 11/14/2021   17:20:58   ( -71.39,  98.18) 11/14/2021   17:22:05  ( -71.30, 100.67)   89.37                67
 11/14/2021   18:11:25   (  70.45, -92.92) 11/14/2021   18:11:45  (  70.48, -92.94)    3.42                20
 11/14/2021   19:02:07   ( -70.36,  74.55) 11/14/2021   19:01:15  ( -70.38,  74.54)    2.14                52