Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 22.  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   06:30:02   (  69.63,  82.08) 04/22/2021   06:31:06  (  69.65,  82.07)    2.16                64
 04/22/2021   07:20:44   ( -69.56,-110.49) 04/22/2021   07:20:36  ( -69.53,-110.46)    3.04                 8
 04/22/2021   08:11:20   (  69.05,  57.55) 04/22/2021   08:10:09  (  69.10,  56.61)   37.51                71
 04/24/2021   22:46:22   (  69.65,-162.01) 04/24/2021   22:47:33  (  69.65,-162.05)    1.86                71
 04/24/2021   23:37:03   ( -69.52,   5.50) 04/24/2021   23:37:03  ( -69.54,   5.43)    3.35                 0
 04/25/2021   00:27:44   (  69.28, 173.16) 04/25/2021   00:26:32  (  69.32, 172.78)   15.53                72
 04/27/2021   15:02:46   (  69.88, -46.41) 04/27/2021   15:03:57  (  69.82, -45.95)   19.12                71
 04/27/2021   15:53:24   ( -69.60, 121.33) 04/27/2021   15:53:29  ( -69.60, 121.38)    2.00                 5
 04/27/2021   16:44:07   (  69.46, -71.16) 04/27/2021   16:42:57  (  69.43, -71.19)    3.33                70
 04/30/2021   07:19:10   (  70.11,  69.17) 04/30/2021   07:20:20  (  70.03,  70.22)   41.13                70
 04/30/2021   08:09:43   ( -69.62,-122.77) 04/30/2021   08:09:55  ( -69.59,-122.75)    3.03                12
 04/30/2021   09:00:26   (  69.48,  44.75) 04/30/2021   08:59:22  (  69.48,  44.75)    0.16                64
 05/02/2021   23:35:33   (  70.35,-175.26) 05/02/2021   23:36:42  (  70.24,-173.60)   63.43                69
 05/03/2021   00:26:03   ( -69.64,  -6.86) 05/03/2021   00:26:21  ( -69.64,  -6.81)    2.30                18
 05/03/2021   01:16:46   (  69.50, 160.65) 05/03/2021   01:15:48  (  69.52, 160.68)    2.37                58
 05/05/2021   15:51:57   (  70.58, -59.70) 05/05/2021   15:53:04  (  70.49, -57.35)   87.71                67
 05/05/2021   16:42:22   ( -69.62, 109.11) 05/05/2021   16:42:48  ( -69.62, 109.05)    2.46                26
 05/05/2021   17:33:06   (  69.53, -83.45) 05/05/2021   17:32:15  (  69.50, -83.46)    2.92                51