Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 30.  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)
 07/30/2021   11:06:09   ( -70.75,-167.89) 07/30/2021   11:07:17  ( -70.62,-166.07)   68.33                68
 07/30/2021   11:56:40   (  70.00,   0.61) 07/30/2021   11:56:54  (  69.98,   0.64)    3.02                14
 07/30/2021   12:47:21   ( -69.86, 168.14) 07/30/2021   12:46:24  ( -69.86, 168.11)    1.27                57
 08/02/2021   03:22:33   ( -71.03, -52.43) 08/02/2021   03:23:38  ( -70.93, -49.72)   98.79                65
 08/02/2021   04:12:59   (  70.03, 116.50) 08/02/2021   04:13:20  (  70.01, 116.57)    3.33                21
 08/02/2021   05:03:40   ( -69.88, -75.95) 08/02/2021   05:02:50  ( -69.90, -75.96)    1.34                50
 08/04/2021   20:29:16   (  70.01,-127.52) 08/04/2021   20:29:45  (  70.04,-127.51)    3.32                29
 08/04/2021   21:19:58   ( -69.91,  39.94) 08/04/2021   21:19:15  ( -69.93,  39.96)    1.90                43
 08/07/2021   12:45:35   (  70.04, -11.63) 08/07/2021   12:46:11  (  70.06, -11.60)    2.53                36
 08/07/2021   13:36:17   ( -69.94, 155.84) 08/07/2021   13:35:41  ( -69.96, 155.88)    2.01                36
 08/10/2021   05:01:54   (  70.08, 104.26) 08/10/2021   05:02:37  (  70.08, 104.31)    1.68                43
 08/10/2021   05:52:36   ( -69.98, -88.26) 08/10/2021   05:52:07  ( -69.98, -88.21)    2.06                29
 08/12/2021   21:18:13   (  70.11,-139.85) 08/12/2021   21:19:03  (  70.10,-139.80)    2.64                50
 08/12/2021   22:08:55   ( -70.01,  27.63) 08/12/2021   22:08:33  ( -69.99,  27.69)    3.09                22