Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 21.  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,-154.55) 07/22/2021   10:18:08  ( -70.00,-154.61)    2.43                68
 07/22/2021   11:07:43   (  69.89,  12.95) 07/22/2021   11:07:35  (  69.89,  12.89)    2.12                 8
 07/22/2021   11:58:20   ( -69.54,-179.21) 07/22/2021   11:57:08  ( -69.61,-179.86)   26.47                72
 07/25/2021   02:33:21   ( -70.13, -38.80) 07/25/2021   02:34:32  ( -70.09, -38.60)    9.24                71
 07/25/2021   03:24:02   (  69.91, 128.85) 07/25/2021   03:24:00  (  69.92, 128.82)    1.55                 2
 07/25/2021   04:14:43   ( -69.77, -63.61) 07/25/2021   04:13:30  ( -69.81, -63.70)    5.87                73
 07/27/2021   18:49:43   ( -70.31,  76.86) 07/27/2021   18:50:55  ( -70.22,  77.48)   25.35                72
 07/27/2021   19:40:21   (  69.94,-115.25) 07/27/2021   19:40:25  (  69.95,-115.26)    0.92                 4
 07/27/2021   20:31:03   ( -69.84,  52.22) 07/27/2021   20:29:55  ( -69.84,  52.22)    0.52                68
 07/30/2021   11:06:05   ( -70.55,-167.57) 07/30/2021   11:07:15  ( -70.47,-166.28)   48.68                70
 07/30/2021   11:56:39   (  69.97,   0.65) 07/30/2021   11:56:49  (  69.97,   0.65)    0.07                10
 07/30/2021   12:47:21   ( -69.87, 168.12) 07/30/2021   12:46:19  ( -69.86, 168.14)    0.81                62
 08/02/2021   03:22:28   ( -70.78, -52.01) 08/02/2021   03:23:36  ( -70.71, -50.04)   72.80                68
 08/02/2021   04:12:58   (  70.00, 116.55) 08/02/2021   04:13:14  (  69.99, 116.56)    1.40                16
 08/02/2021   05:03:40   ( -69.90, -75.98) 08/02/2021   05:02:44  ( -69.88, -75.95)    1.55                56