Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 9 23.  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)
 09/25/2021   18:10:48   ( -71.35,  85.39) 09/25/2021   18:11:58  ( -71.36,  85.37)    1.18                70
 09/25/2021   19:01:32   (  71.24,-107.11) 09/25/2021   19:01:25  (  71.26,-107.14)    2.48                 7
 09/25/2021   19:52:10   ( -70.99,  60.64) 09/25/2021   19:50:57  ( -71.04,  60.14)   19.02                73
 09/28/2021   10:27:12   ( -71.67,-159.24) 09/28/2021   10:28:23  ( -71.58,-158.38)   31.75                71
 09/28/2021   11:17:50   (  71.26,   8.81) 09/28/2021   11:17:54  (  71.27,   8.75)    2.46                 4
 09/28/2021   12:08:32   ( -71.21, 176.21) 09/28/2021   12:07:23  ( -71.21, 176.29)    2.70                69
 10/01/2021   02:43:37   ( -72.04, -43.99) 10/01/2021   02:44:45  ( -71.96, -41.86)   74.04                68
 10/01/2021   03:34:09   (  71.32, 124.64) 10/01/2021   03:34:22  (  71.32, 124.72)    2.87                13
 10/01/2021   04:24:50   ( -71.22, -67.86) 10/01/2021   04:23:52  ( -71.21, -67.83)    2.11                58
 10/03/2021   19:50:26   (  71.29,-119.35) 10/03/2021   19:50:51  (  71.31,-119.41)    3.31                25
 10/03/2021   20:41:08   ( -71.24,  48.06) 10/03/2021   20:40:20  ( -71.26,  48.13)    3.44                48
 10/06/2021   12:06:44   (  71.36,  -3.53) 10/06/2021   12:07:18  (  71.35,  -3.46)    2.70                34
 10/06/2021   12:57:25   ( -71.25, 163.97) 10/06/2021   12:56:48  ( -71.25, 164.00)    1.25                37