Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 12 25.  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)
 12/26/2021   23:43:13   (  70.75,-176.03) 12/26/2021   23:44:21  (  70.76,-175.97)    1.99                68
 12/27/2021   00:33:56   ( -70.65,  -8.54) 12/27/2021   00:33:51  ( -70.64,  -8.52)    1.45                 5
 12/27/2021   01:24:34   (  70.20, 159.48) 12/27/2021   01:23:23  (  70.26, 158.57)   34.66                71
 12/29/2021   15:10:22   ( -70.73, 132.25) 12/29/2021   15:11:21  ( -70.74, 132.24)    1.84                59
 12/29/2021   16:01:07   (  70.66, -60.33) 12/29/2021   16:00:48  (  70.64, -60.27)    2.80                19
 12/29/2021   16:51:37   ( -69.86, 108.23) 12/29/2021   16:50:29  ( -69.92, 106.33)   73.11                68
 01/01/2022   06:37:32   (  70.74,  80.45) 01/01/2022   06:38:17  (  70.73,  80.47)    1.59                45
 01/01/2022   07:28:15   ( -70.63,-112.05) 01/01/2022   07:27:47  ( -70.62,-112.07)    1.05                28
 01/03/2022   22:04:41   ( -70.71,  28.73) 01/03/2022   22:05:17  ( -70.70,  28.66)    2.66                36
 01/03/2022   22:55:26   (  70.65,-163.86) 01/03/2022   22:54:43  (  70.64,-163.78)    3.13                43
 01/06/2022   13:31:52   (  70.74, -23.09) 01/06/2022   13:32:13  (  70.72, -23.07)    2.87                21
 01/06/2022   14:22:35   ( -70.61, 144.43) 01/06/2022   14:21:43  ( -70.61, 144.41)    0.79                52