Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 29.  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)
 12/29/2021   15:10:22   ( -70.75, 132.21) 12/29/2021   15:11:21  ( -70.72, 132.21)    3.26                59
 12/29/2021   16:01:06   (  70.62, -60.27) 12/29/2021   16:00:48  (  70.62, -60.30)    0.80                18
 12/29/2021   16:51:37   ( -69.89, 108.19) 12/29/2021   16:50:28  ( -69.96, 106.37)   69.91                69
 01/01/2022   06:37:32   (  70.72,  80.49) 01/01/2022   06:38:18  (  70.71,  80.44)    1.94                46
 01/01/2022   07:28:16   ( -70.66,-112.10) 01/01/2022   07:27:47  ( -70.65,-112.02)    2.97                29
 01/03/2022   22:04:41   ( -70.75,  28.67) 01/03/2022   22:05:16  ( -70.73,  28.71)    2.29                35
 01/03/2022   22:55:25   (  70.63,-163.83) 01/03/2022   22:54:43  (  70.62,-163.81)    1.13                42
 01/06/2022   13:31:51   (  70.73, -23.08) 01/06/2022   13:32:12  (  70.75, -23.02)    2.60                21
 01/06/2022   14:22:34   ( -70.61, 144.43) 01/06/2022   14:21:42  ( -70.64, 144.45)    2.93                52
 01/09/2022   04:08:26   (  71.31, 116.86) 01/09/2022   04:09:35  (  71.18, 118.26)   51.94                69
 01/09/2022   04:59:00   ( -70.71, -74.81) 01/09/2022   04:59:12  ( -70.70, -74.86)    2.37                12
 01/09/2022   05:49:44   (  70.60,  92.67) 01/09/2022   05:48:39  (  70.58,  92.62)    3.16                65
 01/11/2022   19:35:28   ( -70.92,  65.76) 01/11/2022   19:36:40  ( -70.85,  65.99)   11.14                72
 01/11/2022   20:26:10   (  70.71,-126.59) 01/11/2022   20:26:07  (  70.74,-126.54)    3.25                 3
 01/11/2022   21:16:52   ( -70.53,  41.02) 01/11/2022   21:15:38  ( -70.58,  40.85)    8.28                74