Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 14.  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)
 07/14/2021   09:28:04   ( -69.97,-142.33) 07/14/2021   09:28:52  ( -69.96,-142.31)    1.88                48
 07/14/2021   10:18:47   (  69.85,  25.18) 07/14/2021   10:18:19  (  69.85,  25.19)    0.79                28
 07/14/2021   11:09:11   ( -68.81,-166.02) 07/14/2021   11:08:05  ( -68.85,-168.50)   99.43                66
 07/17/2021   01:44:23   ( -69.99, -26.41) 07/17/2021   01:45:17  ( -70.00, -26.37)    2.16                54
 07/17/2021   02:35:06   (  69.87, 141.09) 07/17/2021   02:34:44  (  69.89, 141.13)    3.27                22
 07/17/2021   03:25:34   ( -69.04, -50.40) 07/17/2021   03:24:26  ( -69.12, -52.27)   75.07                68
 07/19/2021   18:00:42   ( -70.01,  89.51) 07/19/2021   18:01:43  ( -69.99,  89.50)    2.15                61
 07/19/2021   18:51:25   (  69.89,-103.01) 07/19/2021   18:51:10  (  69.88,-103.01)    1.82                15
 07/19/2021   19:41:58   ( -69.32,  65.15) 07/19/2021   19:40:47  ( -69.38,  63.95)   47.32                71
 07/22/2021   10:17:01   ( -70.03,-154.58) 07/22/2021   10:18:08  ( -70.02,-154.57)    0.51                67
 07/22/2021   11:07:44   (  69.92,  12.90) 07/22/2021   11:07:35  (  69.91,  12.92)    1.17                 9
 07/22/2021   11:58:21   ( -69.56,-179.25) 07/22/2021   11:57:09  ( -69.58,-179.90)   25.49                72
 07/25/2021   02:33:20   ( -70.10, -38.75) 07/25/2021   02:34:32  ( -70.06, -38.64)    6.46                72
 07/25/2021   03:24:02   (  69.94, 128.80) 07/25/2021   03:23:59  (  69.94, 128.84)    1.63                 3
 07/25/2021   04:14:43   ( -69.79, -63.65) 07/25/2021   04:13:30  ( -69.78, -63.75)    3.92                73
 07/27/2021   18:49:43   ( -70.33,  76.83) 07/27/2021   18:50:54  ( -70.25,  77.51)   27.47                71
 07/27/2021   19:40:21   (  69.97,-115.30) 07/27/2021   19:40:24  (  69.96,-115.24)    2.27                 3
 07/27/2021   20:31:03   ( -69.86,  52.18) 07/27/2021   20:29:54  ( -69.86,  52.25)    2.57                69