Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 9 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)
 09/01/2021   14:53:25   (  71.27, -45.32) 09/01/2021   14:54:08  (  71.29, -45.28)    2.43                43
 09/01/2021   15:44:06   ( -71.15, 122.21) 09/01/2021   15:43:38  ( -71.18, 122.16)    3.07                28
 09/04/2021   07:09:43   (  71.27,  70.64) 09/04/2021   07:10:38  (  71.29,  70.59)    2.74                55
 09/04/2021   08:00:25   ( -71.20,-121.93) 09/04/2021   08:00:08  ( -71.17,-121.96)    3.07                17
 09/04/2021   08:50:54   (  70.33,  46.83) 09/04/2021   08:49:47  (  70.42,  44.53)   86.51                67
 09/06/2021   23:26:01   (  71.31,-173.50) 09/06/2021   23:27:06  (  71.33,-173.47)    2.15                65
 09/07/2021   00:16:42   ( -71.19,  -5.97) 09/07/2021   00:16:36  ( -71.22,  -6.01)    3.13                 6
 09/07/2021   01:07:19   (  70.75, 162.10) 09/07/2021   01:06:09  (  70.79, 160.96)   42.01                70
 09/09/2021   15:42:23   (  71.52, -57.92) 09/09/2021   15:43:34  (  71.42, -57.43)   20.07                71
 09/09/2021   16:33:01   ( -71.24, 109.89) 09/09/2021   16:33:05  ( -71.26, 109.94)    2.63                 4
 09/09/2021   17:23:45   (  71.16, -82.65) 09/09/2021   17:22:32  (  71.16, -82.59)    2.39                73
 09/12/2021   07:58:48   (  71.87,  57.37) 09/12/2021   07:59:57  (  71.78,  59.04)   59.09                69
 09/12/2021   08:49:19   ( -71.24,-134.16) 09/12/2021   08:49:35  ( -71.24,-134.21)    1.90                16
 09/12/2021   09:40:03   (  71.15,  33.30) 09/12/2021   09:39:02  (  71.13,  33.26)    2.58                61
 09/15/2021   01:05:38   ( -71.29, -18.30) 09/15/2021   01:06:04  ( -71.27, -18.28)    2.12                26
 09/15/2021   01:56:21   (  71.15, 149.25) 09/15/2021   01:55:31  (  71.16, 149.19)    2.51                50