Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 28.  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)
 10/29/2021   15:42:59   ( -70.47, 124.03) 10/29/2021   15:43:43  ( -70.45, 124.10)    3.53                44
 10/29/2021   16:33:42   (  70.32, -68.43) 10/29/2021   16:33:10  (  70.35, -68.40)    3.08                32
 11/01/2021   07:59:16   ( -70.45,-120.00) 11/01/2021   08:00:10  ( -70.44,-120.04)    2.22                54
 11/01/2021   08:49:59   (  70.32,  47.53) 11/01/2021   08:49:37  (  70.33,  47.46)    3.31                22
 11/01/2021   09:40:27   ( -69.51,-143.93) 11/01/2021   09:39:19  ( -69.56,-145.99)   80.06                68
 11/04/2021   00:15:34   ( -70.50,  -4.12) 11/04/2021   00:16:36  ( -70.47,  -4.11)    2.58                62
 11/04/2021   01:06:17   (  70.37, 163.40) 11/04/2021   01:06:03  (  70.37, 163.38)    0.82                14
 11/04/2021   01:56:50   ( -69.82, -28.44) 11/04/2021   01:55:40  ( -69.87, -29.69)   48.32                70
 11/06/2021   16:31:51   ( -70.49, 111.84) 11/06/2021   16:33:02  ( -70.50, 111.81)    1.93                71
 11/06/2021   17:22:35   (  70.42, -80.73) 11/06/2021   17:22:29  (  70.39, -80.71)    2.95                 6
 11/06/2021   18:13:13   ( -70.13,  87.05) 11/06/2021   18:12:01  ( -70.17,  86.61)   17.14                72
 11/09/2021   08:48:13   ( -70.80,-132.71) 11/09/2021   08:49:24  ( -70.69,-132.04)   27.41                71
 11/09/2021   09:38:51   (  70.42,  35.22) 11/09/2021   09:38:54  (  70.41,  35.20)    1.36                 3
 11/09/2021   10:29:33   ( -70.33,-157.32) 11/09/2021   10:28:24  ( -70.30,-157.32)    3.09                69