Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 17.  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)
 02/19/2021   14:32:54   (  69.42, -38.71) 02/19/2021   14:33:54  (  69.43, -38.69)    0.73                60
 02/19/2021   15:23:35   ( -69.32, 128.76) 02/19/2021   15:23:24  ( -69.32, 128.79)    1.16                11
 02/19/2021   16:14:09   (  68.68, -63.04) 02/19/2021   16:12:59  (  68.76, -64.27)   50.47                70
 02/22/2021   06:49:15   (  69.45,  77.18) 02/22/2021   06:50:20  (  69.46,  77.23)    2.33                65
 02/22/2021   07:39:56   ( -69.34,-115.33) 02/22/2021   07:39:50  ( -69.35,-115.27)    3.08                 6
 02/22/2021   08:30:34   (  68.92,  52.56) 02/22/2021   08:29:22  (  68.96,  51.86)   28.27                72
 02/24/2021   23:05:35   (  69.48,-166.93) 02/24/2021   23:06:45  (  69.49,-166.84)    3.47                70
 02/24/2021   23:56:16   ( -69.36,   0.57) 02/24/2021   23:56:16  ( -69.33,   0.58)    2.89                 0
 02/25/2021   00:46:57   (  69.11, 168.23) 02/25/2021   00:45:44  (  69.16, 168.00)   10.86                73
 02/27/2021   15:21:59   (  69.67, -51.27) 02/27/2021   15:23:10  (  69.57, -50.85)   19.45                71
 02/27/2021   16:12:37   ( -69.38, 116.47) 02/27/2021   16:12:42  ( -69.36, 116.50)    2.57                 5
 02/27/2021   17:03:20   (  69.24, -76.03) 02/27/2021   17:02:09  (  69.24, -76.02)    0.72                71
 03/02/2021   07:38:23   (  69.85,  64.38) 03/02/2021   07:39:33  (  69.75,  65.28)   36.35                70
 03/02/2021   08:28:58   ( -69.40,-127.63) 03/02/2021   08:29:08  ( -69.38,-127.59)    2.96                10
 03/02/2021   09:19:41   (  69.27,  39.86) 03/02/2021   09:18:35  (  69.25,  39.89)    2.10                66