Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 7.  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)
 08/07/2021   12:45:35   (  70.05, -11.64) 08/07/2021   12:46:11  (  70.06, -11.60)    1.95                36
 08/07/2021   13:36:17   ( -69.96, 155.82) 08/07/2021   13:35:41  ( -69.95, 155.87)    2.77                36
 08/10/2021   05:01:54   (  70.09, 104.24) 08/10/2021   05:02:37  (  70.09, 104.31)    2.52                43
 08/10/2021   05:52:35   ( -69.95, -88.21) 08/10/2021   05:52:07  ( -69.97, -88.22)    2.84                28
 08/12/2021   21:18:12   (  70.08,-139.79) 08/12/2021   21:19:03  (  70.10,-139.79)    2.84                51
 08/12/2021   22:08:54   ( -69.98,  27.67) 08/12/2021   22:08:33  ( -69.99,  27.69)    1.10                21
 08/12/2021   22:59:21   (  69.02,-163.61) 08/12/2021   22:58:15  (  69.05,-165.92)   92.06                66
 08/15/2021   13:34:30   (  70.12, -23.91) 08/15/2021   13:35:28  (  70.11, -23.89)    0.72                58
 08/15/2021   14:25:12   ( -70.02, 143.56) 08/15/2021   14:24:58  ( -70.01, 143.59)    2.16                14
 08/15/2021   15:15:44   (  69.33, -48.10) 08/15/2021   15:14:35  (  69.34, -49.67)   61.54                69
 08/18/2021   05:50:48   (  70.11,  92.05) 08/18/2021   05:51:54  (  70.12,  92.00)    2.58                66
 08/18/2021   06:41:30   ( -70.01,-100.48) 08/18/2021   06:41:24  ( -70.02,-100.52)    1.38                 6
 08/18/2021   07:32:07   (  69.58,  67.47) 08/18/2021   07:30:56  (  69.63,  66.59)   34.55                71
 08/20/2021   22:07:08   (  70.20,-152.15) 08/20/2021   22:08:19  (  70.18,-152.04)    5.17                71
 08/20/2021   22:57:49   ( -70.06,  15.39) 08/20/2021   22:57:49  ( -70.08,  15.45)    3.12                 0
 08/20/2021   23:48:30   (  69.84,-176.96) 08/20/2021   23:47:18  (  69.85,-177.22)   10.02                72