Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 5 21.  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)
 05/22/2021   15:29:26   (  71.58, -55.59) 05/22/2021   15:30:35  (  71.47, -54.27)   48.30                69
 05/22/2021   16:19:58   ( -71.02, 112.72) 05/22/2021   16:20:11  ( -71.03, 112.66)    2.74                13
 05/22/2021   17:10:43   (  70.96, -79.88) 05/22/2021   17:09:38  (  70.94, -79.85)    2.77                65
 05/25/2021   07:45:53   (  71.99,  59.59) 05/25/2021   07:46:58  (  71.88,  62.31)   94.38                65
 05/25/2021   08:36:18   ( -71.06,-131.42) 05/25/2021   08:36:41  ( -71.07,-131.41)    0.79                23
 05/25/2021   09:27:02   (  70.95,  36.07) 05/25/2021   09:26:08  (  70.97,  36.08)    1.68                54
 05/28/2021   00:52:38   ( -71.11, -15.56) 05/28/2021   00:53:11  ( -71.10, -15.48)    2.98                33
 05/28/2021   01:43:22   (  71.00, 151.93) 05/28/2021   01:42:38  (  71.00, 152.00)    2.75                44
 05/30/2021   17:08:57   ( -71.11, 100.39) 05/30/2021   17:09:41  ( -71.13, 100.44)    2.85                44
 05/30/2021   17:59:41   (  71.01, -92.13) 05/30/2021   17:59:08  (  71.02, -92.08)    2.59                33
 06/02/2021   09:25:15   ( -71.11,-143.68) 06/02/2021   09:26:11  ( -71.09,-143.73)    2.59                56
 06/02/2021   10:15:59   (  71.01,  23.80) 06/02/2021   10:15:38  (  70.99,  23.74)    3.27                21