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   (  69.68,-162.04) 04/24/2021   22:47:32  (  69.69,-162.00)    2.29                70
 04/24/2021   23:37:03   ( -69.55,   5.46) 04/24/2021   23:37:02  ( -69.57,   5.47)    2.41                 1
 04/25/2021   00:27:44   (  69.31, 173.13) 04/25/2021   00:26:31  (  69.36, 172.83)   13.03                73
 04/27/2021   15:02:46   (  69.91, -46.46) 04/27/2021   15:03:56  (  69.85, -45.90)   22.25                70
 04/27/2021   15:53:23   ( -69.58, 121.36) 04/27/2021   15:53:29  ( -69.57, 121.35)    0.63                 6
 04/27/2021   16:44:07   (  69.49, -71.20) 04/27/2021   16:42:56  (  69.47, -71.15)    3.34                71
 04/30/2021   07:19:10   (  70.15,  69.11) 04/30/2021   07:20:20  (  70.01,  70.19)   43.98                70
 04/30/2021   08:09:43   ( -69.61,-122.75) 04/30/2021   08:09:55  ( -69.62,-122.71)    2.32                12
 04/30/2021   09:00:26   (  69.47,  44.77) 04/30/2021   08:59:23  (  69.46,  44.72)    2.21                63
 05/02/2021   23:35:34   (  70.39,-175.33) 05/02/2021   23:36:42  (  70.27,-173.56)   67.90                68
 05/03/2021   00:26:03   ( -69.64,  -6.86) 05/03/2021   00:26:22  ( -69.61,  -6.84)    3.28                19
 05/03/2021   01:16:46   (  69.50, 160.66) 05/03/2021   01:15:49  (  69.50, 160.65)    0.40                57
 05/05/2021   15:51:57   (  70.64, -59.79) 05/05/2021   15:53:03  (  70.52, -57.31)   92.74                66
 05/05/2021   16:42:21   ( -69.62, 109.11) 05/05/2021   16:42:47  ( -69.65, 109.09)    2.78                26
 05/05/2021   17:33:05   (  69.53, -83.45) 05/05/2021   17:32:14  (  69.53, -83.42)    1.20                51
 05/08/2021   08:58:41   ( -69.66,-135.01) 05/08/2021   08:59:13  ( -69.68,-134.99)    1.86                32
 05/08/2021   09:49:25   (  69.57,  32.43) 05/08/2021   09:48:40  (  69.56,  32.49)    3.07                45