Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 7 3.  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)
 07/04/2021   14:22:29   ( -71.13, 142.21) 07/04/2021   14:22:59  ( -71.12, 142.17)    1.81                30
 07/04/2021   15:13:13   (  71.05, -50.34) 07/04/2021   15:12:26  (  71.03, -50.33)    2.45                47
 07/07/2021   06:38:47   ( -71.14,-101.87) 07/07/2021   06:39:27  ( -71.14,-101.91)    1.74                40
 07/07/2021   07:29:31   (  71.07,  65.57) 07/07/2021   07:28:54  (  71.04,  65.58)    2.88                37
 07/09/2021   22:55:06   ( -71.16,  14.05) 07/09/2021   22:55:56  ( -71.16,  13.99)    2.06                50
 07/09/2021   23:45:49   (  71.04,-178.43) 07/09/2021   23:45:23  (  71.06,-178.52)    3.70                26
 07/12/2021   15:11:25   ( -71.17, 129.96) 07/12/2021   15:12:25  ( -71.17, 129.89)    2.56                60
 07/12/2021   16:02:09   (  71.12, -62.62) 07/12/2021   16:01:51  (  71.12, -62.54)    2.88                18
 07/12/2021   16:52:40   ( -70.45, 105.80) 07/12/2021   16:51:31  ( -70.47, 104.09)   63.65                69
 07/15/2021   07:27:44   ( -71.19,-114.13) 07/15/2021   07:28:54  ( -71.18,-114.21)    3.58                70
 07/15/2021   08:18:28   (  71.14,  53.28) 07/15/2021   08:18:20  (  71.12,  53.35)    3.20                 8
 07/15/2021   09:09:05   ( -70.78,-138.80) 07/15/2021   09:07:53  ( -70.86,-139.44)   24.79                72