Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 28.  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)
 08/28/2021   22:56:17   (  70.97,-165.57) 08/28/2021   22:57:24  (  70.85,-163.40)   79.87                67
 08/28/2021   23:46:44   ( -70.12,   3.14) 08/28/2021   23:47:05  ( -70.13,   3.17)    2.14                21
 08/29/2021   00:37:27   (  69.98, 170.66) 08/29/2021   00:36:33  (  69.98, 170.59)    2.74                54
 08/31/2021   16:03:02   ( -70.11, 119.10) 08/31/2021   16:03:31  ( -70.12, 119.02)    2.88                29
 08/31/2021   16:53:46   (  70.03, -73.46) 08/31/2021   16:52:58  (  70.01, -73.48)    1.86                48
 09/03/2021   08:19:20   ( -70.16,-125.03) 09/03/2021   08:19:55  ( -70.15,-125.05)    1.26                35
 09/03/2021   09:10:03   (  70.02,  42.49) 09/03/2021   09:09:22  (  70.04,  42.44)    2.65                41
 09/06/2021   00:35:38   ( -70.15,  -9.08) 09/06/2021   00:36:20  ( -70.17,  -9.13)    2.70                42
 09/06/2021   01:26:22   (  70.07, 158.36) 09/06/2021   01:25:47  (  70.06, 158.35)    1.51                35
 09/08/2021   16:51:57   ( -70.20, 106.78) 09/08/2021   16:52:45  ( -70.18, 106.77)    2.31                48
 09/08/2021   17:42:40   (  70.07, -85.69) 09/08/2021   17:42:12  (  70.07, -85.75)    2.24                28