Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 4.  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)
 08/04/2021   20:29:17   (  70.03,-127.55) 08/04/2021   20:29:46  (  70.03,-127.53)    0.61                29
 08/04/2021   21:19:59   ( -69.94,  39.91) 08/04/2021   21:19:16  ( -69.91,  39.94)    3.18                43
 08/07/2021   12:45:35   (  70.06, -11.66) 08/07/2021   12:46:11  (  70.05, -11.62)    1.80                36
 08/07/2021   13:36:16   ( -69.92, 155.89) 08/07/2021   13:35:41  ( -69.94, 155.86)    2.86                35
 08/10/2021   05:01:54   (  70.10, 104.23) 08/10/2021   05:02:37  (  70.08, 104.30)    3.37                43
 08/10/2021   05:52:35   ( -69.95, -88.22) 08/10/2021   05:52:07  ( -69.97, -88.23)    1.76                28
 08/12/2021   21:18:12   (  70.08,-139.80) 08/12/2021   21:19:03  (  70.09,-139.80)    1.34                51
 08/12/2021   22:08:54   ( -69.98,  27.67) 08/12/2021   22:08:33  ( -69.99,  27.68)    0.54                21
 08/12/2021   22:59:21   (  69.02,-163.62) 08/12/2021   22:58:14  (  69.10,-165.86)   89.53                67
 08/15/2021   13:34:31   (  70.12, -23.91) 08/15/2021   13:35:29  (  70.11, -23.90)    1.48                58
 08/15/2021   14:25:13   ( -70.02, 143.55) 08/15/2021   14:24:59  ( -70.00, 143.59)    2.48                14
 08/15/2021   15:15:45   (  69.33, -48.11) 08/15/2021   15:14:35  (  69.39, -49.60)   59.07                70