Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 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)
 02/24/2021   23:05:36   (  69.53,-167.01) 02/24/2021   23:06:48  (  69.50,-166.84)    7.32                72
 02/24/2021   23:56:16   ( -69.37,   0.56) 02/24/2021   23:56:19  ( -69.34,   0.57)    3.34                 3
 02/25/2021   00:46:59   (  69.22, 168.08) 02/25/2021   00:45:46  (  69.23, 168.07)    1.31                73
 02/27/2021   15:22:01   (  69.78, -51.44) 02/27/2021   15:23:12  (  69.71, -50.69)   29.95                71
 02/27/2021   16:12:37   ( -69.39, 116.45) 02/27/2021   16:12:46  ( -69.38, 116.50)    2.49                 9
 02/27/2021   17:03:20   (  69.25, -76.04) 02/27/2021   17:02:13  (  69.27, -76.00)    2.56                67
 03/02/2021   07:38:26   (  70.02,  64.12) 03/02/2021   07:39:35  (  69.96,  65.54)   54.57                69
 03/02/2021   08:28:57   ( -69.37,-127.58) 03/02/2021   08:29:14  ( -69.36,-127.64)    2.29                17
 03/02/2021   09:19:40   (  69.23,  39.92) 03/02/2021   09:18:41  (  69.25,  39.85)    3.26                59
 03/04/2021   23:54:50   (  70.27, 179.67) 03/04/2021   23:55:57  (  70.21,-178.22)   79.53                67
 03/05/2021   00:45:17   ( -69.39, -11.69) 03/05/2021   00:45:40  ( -69.40, -11.72)    0.96                23
 03/05/2021   01:36:00   (  69.27, 155.80) 03/05/2021   01:35:07  (  69.28, 155.77)    1.72                53
 03/07/2021   17:01:38   ( -69.43, 104.19) 03/07/2021   17:02:07  ( -69.42, 104.20)    0.26                29
 03/07/2021   17:52:21   (  69.30, -88.32) 03/07/2021   17:51:34  (  69.30, -88.31)    0.29                47