Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 7 1.  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)
 07/01/2021   22:56:53   (  70.99,-166.17) 07/01/2021   22:55:57  (  71.00,-166.26)    3.73                56
 07/04/2021   14:22:29   ( -71.13, 142.21) 07/04/2021   14:22:59  ( -71.12, 142.16)    2.36                30
 07/04/2021   15:13:13   (  71.06, -50.35) 07/04/2021   15:12:26  (  71.02, -50.34)    3.55                47
 07/07/2021   06:38:47   ( -71.15,-101.87) 07/07/2021   06:39:27  ( -71.14,-101.92)    2.07                40
 07/07/2021   07:29:30   (  71.02,  65.65) 07/07/2021   07:28:54  (  71.04,  65.57)    3.59                36
 07/09/2021   22:55:06   ( -71.16,  14.04) 07/09/2021   22:55:56  ( -71.15,  13.98)    2.41                50
 07/09/2021   23:45:50   (  71.10,-178.53) 07/09/2021   23:45:22  (  71.10,-178.45)    3.08                28
 07/12/2021   15:11:25   ( -71.18, 129.96) 07/12/2021   15:12:25  ( -71.16, 129.88)    3.25                60
 07/12/2021   16:02:09   (  71.12, -62.63) 07/12/2021   16:01:51  (  71.11, -62.55)    2.86                18
 07/12/2021   16:52:40   ( -70.45, 105.80) 07/12/2021   16:51:31  ( -70.46, 104.08)   63.81                69
 07/15/2021   07:27:44   ( -71.20,-114.13) 07/15/2021   07:28:53  ( -71.22,-114.14)    2.65                69
 07/15/2021   08:18:27   (  71.09,  53.36) 07/15/2021   08:18:20  (  71.11,  53.33)    2.37                 7
 07/15/2021   09:09:05   ( -70.78,-138.80) 07/15/2021   09:07:53  ( -70.85,-139.45)   24.63                72