Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 19.  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)
 01/21/2021   02:42:22   ( -69.37, -41.17) 01/21/2021   02:43:34  ( -69.35, -41.13)    3.23                72
 01/21/2021   03:33:06   (  69.25, 126.32) 01/21/2021   03:33:01  (  69.24, 126.38)    2.52                 5
 01/21/2021   04:23:45   ( -69.05, -66.09) 01/21/2021   04:22:32  ( -69.07, -66.21)    5.16                73
 01/23/2021   18:58:47   ( -69.59,  74.45) 01/23/2021   18:59:59  ( -69.49,  74.94)   22.16                72
 01/23/2021   19:49:27   (  69.26,-117.77) 01/23/2021   19:49:28  (  69.27,-117.70)    3.24                 1
 01/23/2021   20:40:07   ( -69.11,  49.76) 01/23/2021   20:38:59  ( -69.11,  49.72)    1.57                68
 01/26/2021   11:15:12   ( -69.81,-169.95) 01/26/2021   11:16:23  ( -69.69,-168.91)   42.10                71
 01/26/2021   12:05:48   (  69.27,  -1.85) 01/26/2021   12:05:56  (  69.25,  -1.86)    2.16                 8
 01/26/2021   12:56:28   ( -69.12, 165.68) 01/26/2021   12:55:26  ( -69.14, 165.64)    2.80                62
 01/29/2021   03:31:36   ( -70.03, -54.35) 01/29/2021   03:32:45  ( -69.94, -52.69)   64.11                69
 01/29/2021   04:22:08   (  69.28, 114.06) 01/29/2021   04:22:22  (  69.27, 114.06)    0.76                14
 01/29/2021   05:12:49   ( -69.18, -78.48) 01/29/2021   05:11:52  ( -69.17, -78.44)    2.00                57
 01/31/2021   19:48:01   ( -70.24,  61.24) 01/31/2021   19:49:08  ( -70.18,  63.54)   86.81                67
 01/31/2021   20:38:29   (  69.29,-130.03) 01/31/2021   20:38:49  (  69.29,-130.04)    0.30                20
 01/31/2021   21:29:10   ( -69.19,  37.44) 01/31/2021   21:28:19  ( -69.19,  37.47)    1.23                51