Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 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)
 07/22/2021   10:17:00   ( -70.01,-154.56) 07/22/2021   10:18:08  ( -69.99,-154.62)    3.32                68
 07/22/2021   11:07:43   (  69.90,  12.93) 07/22/2021   11:07:35  (  69.88,  12.88)    2.34                 8
 07/22/2021   11:58:20   ( -69.54,-179.22) 07/22/2021   11:57:08  ( -69.61,-179.87)   26.00                72
 07/25/2021   02:33:20   ( -70.09, -38.73) 07/25/2021   02:34:32  ( -70.08, -38.61)    4.68                72
 07/25/2021   03:24:02   (  69.92, 128.83) 07/25/2021   03:24:00  (  69.92, 128.81)    1.34                 2
 07/25/2021   04:14:43   ( -69.77, -63.62) 07/25/2021   04:13:30  ( -69.80, -63.71)    4.74                73
 07/27/2021   18:49:43   ( -70.32,  76.85) 07/27/2021   18:50:55  ( -70.22,  77.47)   26.05                72
 07/27/2021   19:40:21   (  69.95,-115.26) 07/27/2021   19:40:25  (  69.94,-115.27)    0.95                 4
 07/27/2021   20:31:03   ( -69.85,  52.20) 07/27/2021   20:29:55  ( -69.84,  52.21)    1.83                68
 07/30/2021   11:06:05   ( -70.56,-167.58) 07/30/2021   11:07:15  ( -70.46,-166.29)   49.22                70
 07/30/2021   11:56:39   (  69.98,   0.63) 07/30/2021   11:56:49  (  69.97,   0.65)    1.59                10
 07/30/2021   12:47:21   ( -69.88, 168.11) 07/30/2021   12:46:19  ( -69.86, 168.13)    1.92                62
 08/02/2021   03:22:28   ( -70.79, -52.03) 08/02/2021   03:23:36  ( -70.71, -50.04)   73.40                68
 08/02/2021   04:12:58   (  70.01, 116.53) 08/02/2021   04:13:14  (  69.99, 116.56)    2.82                16
 08/02/2021   05:03:40   ( -69.90, -75.99) 08/02/2021   05:02:44  ( -69.88, -75.95)    2.62                56