Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 6 25.  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   (  71.19, -13.03) 06/26/2021   12:44:02  (  71.19, -13.00)    1.17                71
 06/26/2021   13:33:32   ( -71.07, 154.49) 06/26/2021   13:33:32  ( -71.07, 154.44)    1.82                 0
 06/26/2021   14:24:13   (  70.82, -37.78) 06/26/2021   14:23:01  (  70.87, -38.23)   17.11                72
 06/29/2021   04:59:17   (  71.56, 102.24) 06/29/2021   05:00:27  (  71.44, 103.28)   39.17                70
 06/29/2021   05:49:52   ( -71.13, -89.67) 06/29/2021   05:50:01  ( -71.10, -89.63)    3.23                 9
 06/29/2021   06:40:35   (  70.99,  77.87) 06/29/2021   06:39:28  (  71.01,  77.87)    1.43                67
 07/01/2021   21:15:42   (  71.94,-142.51) 07/01/2021   21:16:48  (  71.84,-140.16)   82.11                66
 07/01/2021   22:06:10   ( -71.14,  26.26) 07/01/2021   22:06:29  ( -71.13,  26.30)    1.77                19
 07/01/2021   22:56:53   (  71.01,-166.21) 07/01/2021   22:55:56  (  71.03,-166.21)    2.33                57
 07/04/2021   14:22:29   ( -71.15, 142.18) 07/04/2021   14:22:58  ( -71.15, 142.22)    1.65                29
 07/04/2021   15:13:12   (  71.03, -50.30) 07/04/2021   15:12:25  (  71.05, -50.30)    2.59                47
 07/07/2021   06:38:48   ( -71.16,-101.90) 07/07/2021   06:39:27  ( -71.17,-101.87)    1.87                39
 07/07/2021   07:29:31   (  71.05,  65.61) 07/07/2021   07:28:54  (  71.07,  65.61)    2.22                37