Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 5 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)
 05/25/2021   07:45:53   (  71.97,  59.63) 05/25/2021   07:46:59  (  71.85,  62.24)   91.20                66
 05/25/2021   08:36:18   ( -71.05,-131.39) 05/25/2021   08:36:42  ( -71.03,-131.47)    3.45                24
 05/25/2021   09:27:03   (  70.98,  36.02) 05/25/2021   09:26:08  (  70.99,  36.11)    3.14                55
 05/28/2021   00:52:38   ( -71.09, -15.53) 05/28/2021   00:53:11  ( -71.11, -15.46)    3.57                33
 05/28/2021   01:43:22   (  70.98, 151.97) 05/28/2021   01:42:39  (  70.96, 151.95)    2.21                43
 05/30/2021   17:08:56   ( -71.09, 100.42) 05/30/2021   17:09:41  ( -71.09, 100.38)    1.61                45
 05/30/2021   17:59:40   (  70.98, -92.08) 05/30/2021   17:59:08  (  70.98, -92.14)    2.22                32
 06/02/2021   09:25:16   ( -71.13,-143.72) 06/02/2021   09:26:11  ( -71.11,-143.71)    3.02                55
 06/02/2021   10:16:00   (  71.03,  23.77) 06/02/2021   10:15:38  (  71.00,  23.77)    2.81                22
 06/02/2021   11:06:27   ( -70.20,-167.55) 06/02/2021   11:05:20  ( -70.24,-169.74)   82.47                67
 06/05/2021   01:41:35   ( -71.13, -27.78) 06/05/2021   01:42:41  ( -71.12, -27.80)    1.34                66
 06/05/2021   02:32:19   (  71.03, 139.70) 06/05/2021   02:32:08  (  71.02, 139.67)    1.88                11