Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 27.  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)
 02/27/2021   15:22:01   (  69.79, -51.45) 02/27/2021   15:23:12  (  69.70, -50.70)   30.33                71
 02/27/2021   16:12:36   ( -69.35, 116.51) 02/27/2021   16:12:46  ( -69.37, 116.49)    2.43                10
 02/27/2021   17:03:20   (  69.26, -76.04) 02/27/2021   17:02:13  (  69.26, -76.00)    1.77                67
 03/02/2021   07:38:26   (  70.03,  64.11) 03/02/2021   07:39:35  (  69.96,  65.53)   54.75                69
 03/02/2021   08:28:57   ( -69.38,-127.60) 03/02/2021   08:29:13  ( -69.41,-127.58)    3.15                16
 03/02/2021   09:19:40   (  69.24,  39.91) 03/02/2021   09:18:41  (  69.24,  39.84)    2.71                59
 03/04/2021   23:54:51   (  70.28, 179.66) 03/04/2021   23:55:58  (  70.20,-178.24)   79.56                67
 03/05/2021   00:45:18   ( -69.41, -11.71) 03/05/2021   00:45:41  ( -69.38, -11.74)    3.24                23
 03/05/2021   01:36:00   (  69.28, 155.79) 03/05/2021   01:35:07  (  69.27, 155.76)    1.60                53
 03/07/2021   17:01:38   ( -69.44, 104.17) 03/07/2021   17:02:06  ( -69.46, 104.25)    3.54                28
 03/07/2021   17:52:21   (  69.31, -88.33) 03/07/2021   17:51:34  (  69.29, -88.34)    2.92                47
 03/10/2021   09:17:58   ( -69.42,-139.87) 03/10/2021   09:18:34  ( -69.42,-139.92)    2.21                36
 03/10/2021   10:08:41   (  69.30,  27.62) 03/10/2021   10:08:01  (  69.30,  27.57)    2.01                40
 03/13/2021   01:34:19   ( -69.46, -23.99) 03/13/2021   01:35:01  ( -69.44, -24.03)    2.92                42
 03/13/2021   02:25:02   (  69.34, 143.49) 03/13/2021   02:24:27  (  69.37, 143.53)    3.28                35