Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 23.  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   22:46:23   (  69.69,-162.07) 04/24/2021   22:47:33  (  69.67,-162.03)    3.17                70
 04/24/2021   23:37:04   ( -69.57,   5.44) 04/24/2021   23:37:03  ( -69.55,   5.44)    1.82                 1
 04/25/2021   00:27:44   (  69.27, 173.18) 04/25/2021   00:26:32  (  69.34, 172.80)   16.43                72
 04/27/2021   15:02:46   (  69.87, -46.40) 04/27/2021   15:03:57  (  69.83, -45.93)   18.52                71
 04/27/2021   15:53:24   ( -69.59, 121.34) 04/27/2021   15:53:29  ( -69.61, 121.40)    2.91                 5
 04/27/2021   16:44:07   (  69.45, -71.15) 04/27/2021   16:42:57  (  69.44, -71.18)    1.40                70
 04/30/2021   07:19:09   (  70.11,  69.18) 04/30/2021   07:20:19  (  70.04,  70.24)   40.94                70
 04/30/2021   08:09:43   ( -69.61,-122.76) 04/30/2021   08:09:55  ( -69.60,-122.73)    1.59                12
 04/30/2021   09:00:26   (  69.48,  44.76) 04/30/2021   08:59:22  (  69.49,  44.76)    1.83                64
 05/02/2021   23:35:33   (  70.34,-175.25) 05/02/2021   23:36:42  (  70.25,-173.59)   63.44                69
 05/03/2021   00:26:03   ( -69.64,  -6.86) 05/03/2021   00:26:21  ( -69.65,  -6.79)    2.61                18
 05/03/2021   01:16:46   (  69.50, 160.66) 05/03/2021   01:15:49  (  69.48, 160.62)    2.96                57
 05/05/2021   15:51:58   (  70.63, -59.78) 05/05/2021   15:53:04  (  70.50, -57.34)   91.77                66
 05/05/2021   16:42:22   ( -69.62, 109.11) 05/05/2021   16:42:48  ( -69.63, 109.06)    2.45                26
 05/05/2021   17:33:06   (  69.53, -83.45) 05/05/2021   17:32:15  (  69.51, -83.45)    1.89                51