Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 5 27.  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)
 05/28/2021   00:52:38   ( -71.10, -15.54) 05/28/2021   00:53:11  ( -71.10, -15.47)    2.47                33
 05/28/2021   01:43:22   (  70.98, 151.97) 05/28/2021   01:42:39  (  70.96, 151.94)    3.29                43
 05/30/2021   17:08:56   ( -71.09, 100.41) 05/30/2021   17:09:41  ( -71.07, 100.36)    2.76                45
 05/30/2021   17:59:40   (  70.98, -92.09) 05/30/2021   17:59:08  (  70.98, -92.15)    2.26                32
 06/02/2021   09:25:15   ( -71.09,-143.64) 06/02/2021   09:26:11  ( -71.10,-143.73)    3.31                56
 06/02/2021   10:16:00   (  71.03,  23.77) 06/02/2021   10:15:38  (  71.00,  23.76)    3.54                22
 06/02/2021   11:06:27   ( -70.20,-167.56) 06/02/2021   11:05:20  ( -70.23,-169.76)   82.73                67
 06/05/2021   01:41:35   ( -71.13, -27.78) 06/05/2021   01:42:41  ( -71.11, -27.82)    2.79                66
 06/05/2021   02:32:19   (  71.03, 139.71) 06/05/2021   02:32:08  (  71.01, 139.66)    2.59                11
 06/05/2021   03:22:54   ( -70.62, -52.28) 06/05/2021   03:21:42  ( -70.69, -53.21)   34.85                72
 06/07/2021   17:57:57   ( -71.29,  87.89) 06/07/2021   17:59:09  ( -71.23,  88.25)   14.19                72
 06/07/2021   18:48:39   (  71.08,-104.44) 06/07/2021   18:48:37  (  71.08,-104.36)    3.25                 2
 06/07/2021   19:39:20   ( -70.98,  63.05) 06/07/2021   19:38:07  ( -70.97,  63.11)    2.36                73