Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 15.  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)
 08/15/2021   13:34:31   (  70.11, -23.90) 08/15/2021   13:35:29  (  70.11, -23.89)    0.21                58
 08/15/2021   14:25:12   ( -69.97, 143.63) 08/15/2021   14:24:59  ( -69.99, 143.57)    3.21                13
 08/15/2021   15:15:44   (  69.32, -48.09) 08/15/2021   15:14:35  (  69.34, -49.67)   62.07                69
 08/18/2021   05:50:49   (  70.15,  91.99) 08/18/2021   05:51:54  (  70.12,  92.00)    3.09                65
 08/18/2021   06:41:30   ( -70.01,-100.48) 08/18/2021   06:41:24  ( -70.01,-100.53)    2.05                 6
 08/18/2021   07:32:07   (  69.57,  67.49) 08/18/2021   07:30:56  (  69.63,  66.59)   35.48                71
 08/20/2021   22:07:08   (  70.19,-152.13) 08/20/2021   22:08:19  (  70.18,-152.04)    3.46                71
 08/20/2021   22:57:49   ( -70.05,  15.41) 08/20/2021   22:57:49  ( -70.07,  15.44)    2.52                 0
 08/20/2021   23:48:30   (  69.82,-176.94) 08/20/2021   23:47:18  (  69.85,-177.22)   11.42                72
 08/23/2021   14:23:31   (  70.44, -36.58) 08/23/2021   14:24:42  (  70.35, -35.92)   26.60                71
 08/23/2021   15:14:08   ( -70.09, 131.29) 08/23/2021   15:14:15  ( -70.07, 131.32)    2.16                 7
 08/23/2021   16:04:51   (  69.97, -61.21) 08/23/2021   16:03:42  (  69.96, -61.19)    1.13                69
 08/26/2021   06:39:54   (  70.69,  78.96) 08/26/2021   06:41:03  (  70.62,  80.36)   52.21                69
 08/26/2021   07:30:25   ( -70.08,-112.75) 08/26/2021   07:30:40  ( -70.07,-112.80)    1.86                15
 08/26/2021   08:21:08   (  69.95,  54.75) 08/26/2021   08:20:07  (  69.96,  54.69)    2.40                61
 08/28/2021   22:56:16   (  70.94,-165.51) 08/28/2021   22:57:23  (  70.88,-163.35)   78.75                67
 08/28/2021   23:46:44   ( -70.12,   3.13) 08/28/2021   23:47:05  ( -70.12,   3.16)    1.08                21
 08/29/2021   00:37:27   (  70.00, 170.63) 08/29/2021   00:36:32  (  70.01, 170.64)    1.03                55