Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 24.  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)
 04/24/2021   22:46:22   (  69.67,-162.03) 04/24/2021   22:47:33  (  69.64,-162.07)    3.27                71
 04/24/2021   23:37:03   ( -69.54,   5.47) 04/24/2021   23:37:03  ( -69.53,   5.41)    3.27                 0
 04/25/2021   00:27:44   (  69.30, 173.14) 04/25/2021   00:26:31  (  69.37, 172.84)   13.84                73
 04/27/2021   15:02:46   (  69.90, -46.45) 04/27/2021   15:03:57  (  69.80, -45.97)   21.39                71
 04/27/2021   15:53:23   ( -69.57, 121.37) 04/27/2021   15:53:29  ( -69.58, 121.36)    1.41                 6
 04/27/2021   16:44:07   (  69.48, -71.19) 04/27/2021   16:42:56  (  69.47, -71.14)    2.27                71
 04/30/2021   07:19:10   (  70.14,  69.13) 04/30/2021   07:20:20  (  70.02,  70.20)   43.23                70
 04/30/2021   08:09:43   ( -69.60,-122.73) 04/30/2021   08:09:56  ( -69.57,-122.77)    2.90                13
 04/30/2021   09:00:26   (  69.46,  44.78) 04/30/2021   08:59:23  (  69.46,  44.73)    2.32                63
 05/02/2021   23:35:33   (  70.38,-175.32) 05/02/2021   23:36:41  (  70.28,-173.55)   67.29                68
 05/03/2021   00:26:02   ( -69.63,  -6.84) 05/03/2021   00:26:21  ( -69.62,  -6.83)    1.22                19
 05/03/2021   01:16:45   (  69.49, 160.68) 05/03/2021   01:15:48  (  69.50, 160.66)    1.91                57
 05/05/2021   15:51:57   (  70.63, -59.77) 05/05/2021   15:53:03  (  70.53, -57.30)   92.11                66
 05/05/2021   16:42:22   ( -69.66, 109.05) 05/05/2021   16:42:47  ( -69.65, 109.10)    2.14                25
 05/05/2021   17:33:05   (  69.52, -83.44) 05/05/2021   17:32:14  (  69.54, -83.42)    1.93                51