Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 10.  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)
 08/10/2021   05:01:54   (  70.08, 104.26) 08/10/2021   05:02:37  (  70.09, 104.32)    2.67                43
 08/10/2021   05:52:36   ( -69.99, -88.29) 08/10/2021   05:52:07  ( -69.97, -88.21)    3.39                29
 08/12/2021   21:18:13   (  70.12,-139.85) 08/12/2021   21:19:03  (  70.11,-139.78)    2.87                50
 08/12/2021   22:08:54   ( -69.97,  27.69) 08/12/2021   22:08:33  ( -69.99,  27.69)    2.40                21
 08/12/2021   22:59:21   (  69.01,-163.59) 08/12/2021   22:58:15  (  69.06,-165.91)   92.55                66
 08/15/2021   13:34:30   (  70.10, -23.88) 08/15/2021   13:35:28  (  70.12, -23.88)    2.59                58
 08/15/2021   14:25:12   ( -70.01, 143.58) 08/15/2021   14:24:58  ( -70.01, 143.59)    0.68                14
 08/15/2021   15:15:44   (  69.31, -48.08) 08/15/2021   15:14:35  (  69.35, -49.66)   62.34                69
 08/18/2021   05:50:49   (  70.14,  92.01) 08/18/2021   05:51:54  (  70.13,  92.01)    0.63                65
 08/18/2021   06:41:31   ( -70.04,-100.53) 08/18/2021   06:41:24  ( -70.02,-100.51)    2.62                 7
 08/18/2021   07:32:07   (  69.56,  67.51) 08/18/2021   07:30:56  (  69.63,  66.60)   36.22                71
 08/20/2021   22:07:08   (  70.17,-152.11) 08/20/2021   22:08:19  (  70.19,-152.03)    3.41                71
 08/20/2021   22:57:49   ( -70.03,  15.44) 08/20/2021   22:57:50  ( -70.03,  15.38)    2.20                 1
 08/20/2021   23:48:30   (  69.81,-176.92) 08/20/2021   23:47:18  (  69.86,-177.21)   12.69                72
 08/23/2021   14:23:31   (  70.42, -36.55) 08/23/2021   14:24:43  (  70.30, -35.99)   25.20                72
 08/23/2021   15:14:08   ( -70.07, 131.32) 08/23/2021   15:14:15  ( -70.08, 131.34)    1.93                 7
 08/23/2021   16:04:51   (  69.95, -61.19) 08/23/2021   16:03:42  (  69.96, -61.18)    1.72                69