Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 9 2.  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)
 09/04/2021   07:09:43   (  71.30,  70.58) 09/04/2021   07:10:37  (  71.31,  70.63)    2.29                54
 09/04/2021   08:00:24   ( -71.18,-121.89) 09/04/2021   08:00:07  ( -71.20,-121.92)    2.47                17
 09/04/2021   08:50:54   (  70.36,  46.78) 09/04/2021   08:49:47  (  70.39,  44.48)   85.69                67
 09/06/2021   23:26:01   (  71.30,-173.47) 09/06/2021   23:27:07  (  71.30,-173.51)    1.58                66
 09/07/2021   00:16:43   ( -71.23,  -6.03) 09/07/2021   00:16:36  ( -71.25,  -5.97)    2.86                 7
 09/07/2021   01:07:20   (  70.78, 162.04) 09/07/2021   01:06:09  (  70.82, 161.00)   38.30                71
 09/09/2021   15:42:23   (  71.50, -57.89) 09/09/2021   15:43:34  (  71.45, -57.39)   18.72                71
 09/09/2021   16:33:01   ( -71.23, 109.91) 09/09/2021   16:33:06  ( -71.23, 109.89)    0.86                 5
 09/09/2021   17:23:45   (  71.14, -82.63) 09/09/2021   17:22:33  (  71.13, -82.63)    1.85                72
 09/12/2021   07:58:48   (  71.92,  57.29) 09/12/2021   07:59:56  (  71.81,  59.09)   63.55                68
 09/12/2021   08:49:19   ( -71.28,-134.24) 09/12/2021   08:49:34  ( -71.27,-134.17)    2.92                15
 09/12/2021   09:40:02   (  71.15,  33.32) 09/12/2021   09:39:01  (  71.16,  33.30)    1.71                61
 09/15/2021   01:05:37   ( -71.29, -18.30) 09/15/2021   01:06:03  ( -71.30, -18.24)    2.15                26
 09/15/2021   01:56:21   (  71.20, 149.16) 09/15/2021   01:55:30  (  71.19, 149.23)    2.68                51