Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 23.  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)
 09/24/2021   18:30:02   ( -71.26,  80.72) 09/24/2021   18:31:08  ( -71.17,  83.49)   99.74                66
 09/24/2021   19:20:29   (  70.26,-110.31) 09/24/2021   19:20:50  (  70.25,-110.25)    2.93                21
 09/24/2021   20:11:09   ( -70.12,  57.23) 09/24/2021   20:10:20  ( -70.13,  57.22)    1.77                49
 09/27/2021   11:36:47   (  70.28,   5.61) 09/27/2021   11:37:16  (  70.26,   5.64)    2.44                29
 09/27/2021   12:27:27   ( -70.13, 173.16) 09/27/2021   12:26:46  ( -70.15, 173.11)    2.64                41
 09/30/2021   03:53:05   (  70.29, 121.54) 09/30/2021   03:53:41  (  70.31, 121.60)    3.45                36
 09/30/2021   04:43:46   ( -70.20, -70.99) 09/30/2021   04:43:11  ( -70.21, -70.92)    2.91                35
 10/02/2021   20:09:23   (  70.31,-122.54) 10/02/2021   20:10:07  (  70.31,-122.53)    0.67                44
 10/02/2021   21:00:04   ( -70.21,  44.93) 10/02/2021   20:59:37  ( -70.21,  44.96)    0.97                27
 10/05/2021   12:25:40   (  70.33,  -6.63) 10/05/2021   12:26:31  (  70.35,  -6.58)    3.37                51
 10/05/2021   13:16:21   ( -70.23, 160.86) 10/05/2021   13:16:02  ( -70.20, 160.83)    3.34                19