Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 4 2.  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)
 04/04/2021   08:54:03   (  71.23,  43.53) 04/04/2021   08:55:15  (  71.15,  44.01)   19.13                72
 04/04/2021   09:44:41   ( -70.93,-148.63) 04/04/2021   09:44:47  ( -70.93,-148.71)    3.03                 6
 04/04/2021   10:35:25   (  70.87,  18.78) 04/04/2021   10:34:13  (  70.88,  18.86)    3.38                72
 04/07/2021   01:10:29   (  71.55, 158.91) 04/07/2021   01:11:38  (  71.43, 160.33)   51.88                69
 04/07/2021   02:01:02   ( -70.98, -32.78) 04/07/2021   02:01:14  ( -71.00, -32.73)    2.72                12
 04/07/2021   02:51:45   (  70.87, 134.71) 04/07/2021   02:50:41  (  70.89, 134.75)    2.68                64
 04/09/2021   17:26:54   (  71.81, -85.64) 04/09/2021   17:28:01  (  71.71, -83.33)   81.02                67
 04/09/2021   18:17:22   ( -70.98,  83.15) 04/09/2021   18:17:42  ( -71.00,  83.16)    2.38                20
 04/09/2021   19:08:05   (  70.88,-109.36) 04/09/2021   19:07:09  (  70.90,-109.36)    2.17                56
 04/12/2021   10:33:41   ( -70.99,-160.93) 04/12/2021   10:34:09  ( -71.01,-160.96)    2.40                28
 04/12/2021   11:24:24   (  70.88,   6.57) 04/12/2021   11:23:36  (  70.89,   6.51)    2.50                48
 04/15/2021   02:50:01   ( -70.99, -45.00) 04/15/2021   02:50:37  ( -71.00, -45.09)    3.29                36
 04/15/2021   03:40:45   (  70.94, 122.40) 04/15/2021   03:40:03  (  70.94, 122.46)    2.24                42