Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 6 24.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 06/26/2021   12:42:51   (  71.17, -13.00) 06/26/2021   12:44:03  (  71.15, -13.06)    2.80                72
 06/26/2021   13:33:33   ( -71.10, 154.43) 06/26/2021   13:33:32  ( -71.09, 154.47)    2.25                 1
 06/26/2021   14:24:14   (  70.86, -37.84) 06/26/2021   14:23:01  (  70.89, -38.20)   13.53                73
 06/29/2021   04:59:16   (  71.55, 102.27) 06/29/2021   05:00:26  (  71.45, 103.31)   37.92                70
 06/29/2021   05:49:51   ( -71.11, -89.64) 06/29/2021   05:50:00  ( -71.12, -89.60)    1.89                 9
 06/29/2021   06:40:35   (  71.03,  77.81) 06/29/2021   06:39:27  (  71.02,  77.89)    3.10                68
 07/01/2021   21:15:42   (  71.92,-142.48) 07/01/2021   21:16:49  (  71.80,-140.22)   79.33                67
 07/01/2021   22:06:10   ( -71.12,  26.29) 07/01/2021   22:06:30  ( -71.10,  26.24)    3.22                20
 07/01/2021   22:56:53   (  70.99,-166.19) 07/01/2021   22:55:57  (  70.99,-166.27)    3.05                56
 07/04/2021   14:22:29   ( -71.13, 142.21) 07/04/2021   14:22:59  ( -71.12, 142.16)    2.12                30
 07/04/2021   15:13:12   (  71.01, -50.27) 07/04/2021   15:12:26  (  71.01, -50.36)    3.00                46
 07/07/2021   06:38:48   ( -71.14,-101.87) 07/07/2021   06:39:28  ( -71.14,-101.92)    1.98                40
 07/07/2021   07:29:31   (  71.03,  65.64) 07/07/2021   07:28:55  (  71.03,  65.55)    3.06                36