Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 31.  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)
 11/01/2021   07:59:17   ( -70.48,-120.05) 11/01/2021   08:00:10  ( -70.47,-119.98)    2.50                53
 11/01/2021   08:49:59   (  70.34,  47.49) 11/01/2021   08:49:37  (  70.32,  47.43)    3.21                22
 11/01/2021   09:40:26   ( -69.49,-143.90) 11/01/2021   09:39:19  ( -69.54,-146.01)   82.61                67
 11/04/2021   00:15:33   ( -70.48,  -4.09) 11/04/2021   00:16:35  ( -70.51,  -4.06)    3.27                62
 11/04/2021   01:06:17   (  70.40, 163.35) 11/04/2021   01:06:02  (  70.40, 163.43)    3.02                15
 11/04/2021   01:56:50   ( -69.85, -28.49) 11/04/2021   01:55:39  ( -69.90, -29.64)   44.61                71
 11/06/2021   16:31:51   ( -70.53, 111.78) 11/06/2021   16:33:01  ( -70.53, 111.85)    2.61                70
 11/06/2021   17:22:34   (  70.40, -80.71) 11/06/2021   17:22:28  (  70.42, -80.67)    2.26                 6
 11/06/2021   18:13:13   ( -70.17,  86.98) 11/06/2021   18:12:00  ( -70.20,  86.65)   12.93                73
 11/09/2021   08:48:13   ( -70.80,-132.71) 11/09/2021   08:49:24  ( -70.70,-132.02)   27.44                71
 11/09/2021   09:38:51   (  70.42,  35.23) 11/09/2021   09:38:54  (  70.43,  35.22)    1.11                 3
 11/09/2021   10:29:33   ( -70.33,-157.32) 11/09/2021   10:28:24  ( -70.32,-157.30)    1.81                69
 11/12/2021   01:04:35   ( -71.12, -17.30) 11/12/2021   01:05:44  ( -70.97, -15.73)   59.00                69
 11/12/2021   01:55:07   (  70.43, 151.16) 11/12/2021   01:55:19  (  70.42, 151.09)    2.61                12
 11/12/2021   02:45:49   ( -70.34, -41.38) 11/12/2021   02:44:48  ( -70.37, -41.35)    3.37                61