Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 5 19.  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)
 05/19/2021   23:13:00   (  71.17,-170.81) 05/19/2021   23:14:11  (  71.16,-170.65)    5.96                71
 05/20/2021   00:03:40   ( -71.03,  -3.23) 05/20/2021   00:03:41  ( -71.05,  -3.20)    2.77                 1
 05/20/2021   00:54:22   (  70.81, 164.43) 05/20/2021   00:53:10  (  70.84, 164.13)   11.77                72
 05/22/2021   15:29:26   (  71.57, -55.58) 05/22/2021   15:30:35  (  71.47, -54.27)   47.61                69
 05/22/2021   16:19:59   ( -71.06, 112.64) 05/22/2021   16:20:11  ( -71.03, 112.66)    3.10                12
 05/22/2021   17:10:43   (  70.95, -79.86) 05/22/2021   17:09:38  (  70.93, -79.85)    2.10                65
 05/25/2021   07:45:53   (  71.97,  59.62) 05/25/2021   07:46:59  (  71.83,  62.21)   91.01                66
 05/25/2021   08:36:18   ( -71.04,-131.39) 05/25/2021   08:36:41  ( -71.07,-131.41)    2.70                23
 05/25/2021   09:27:02   (  70.94,  36.10) 05/25/2021   09:26:08  (  70.97,  36.08)    3.19                54
 05/28/2021   00:52:38   ( -71.08, -15.51) 05/28/2021   00:53:11  ( -71.10, -15.48)    2.25                33
 05/28/2021   01:43:22   (  70.98, 151.97) 05/28/2021   01:42:38  (  71.00, 152.00)    2.10                44
 05/30/2021   17:08:58   ( -71.12, 100.36) 05/30/2021   17:09:41  ( -71.13, 100.44)    2.97                43
 05/30/2021   17:59:42   (  71.02, -92.16) 05/30/2021   17:59:08  (  71.02, -92.08)    2.81                34