Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 20.  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)
 04/22/2021   06:30:03   (  69.68,  82.01) 04/22/2021   06:31:06  (  69.66,  82.07)    3.42                63
 04/22/2021   07:20:44   ( -69.55,-110.48) 04/22/2021   07:20:36  ( -69.54,-110.45)    1.48                 8
 04/22/2021   08:11:20   (  69.04,  57.56) 04/22/2021   08:10:09  (  69.11,  56.62)   37.69                71
 04/24/2021   22:46:22   (  69.65,-162.00) 04/24/2021   22:47:33  (  69.66,-162.04)    2.28                71
 04/24/2021   23:37:04   ( -69.57,   5.43) 04/24/2021   23:37:03  ( -69.55,   5.44)    2.49                 1
 04/25/2021   00:27:44   (  69.28, 173.17) 04/25/2021   00:26:32  (  69.33, 172.79)   15.77                72
 04/27/2021   15:02:46   (  69.88, -46.41) 04/27/2021   15:03:57  (  69.82, -45.94)   19.10                71
 04/27/2021   15:53:24   ( -69.59, 121.33) 04/27/2021   15:53:29  ( -69.60, 121.39)    2.50                 5
 04/27/2021   16:44:07   (  69.46, -71.16) 04/27/2021   16:42:57  (  69.44, -71.19)    2.63                70
 04/30/2021   07:19:09   (  70.12,  69.16) 04/30/2021   07:20:19  (  70.03,  70.23)   41.44                70
 04/30/2021   08:09:43   ( -69.62,-122.77) 04/30/2021   08:09:55  ( -69.60,-122.74)    2.65                12
 04/30/2021   09:00:26   (  69.48,  44.74) 04/30/2021   08:59:22  (  69.48,  44.75)    0.43                64
 05/02/2021   23:35:33   (  70.35,-175.27) 05/02/2021   23:36:42  (  70.24,-173.60)   64.00                69
 05/03/2021   00:26:03   ( -69.65,  -6.87) 05/03/2021   00:26:21  ( -69.64,  -6.80)    2.81                18
 05/03/2021   01:16:46   (  69.51, 160.64) 05/03/2021   01:15:48  (  69.52, 160.69)    2.25                58