Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 3 31.  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)
 04/01/2021   16:37:40   (  71.05, -72.08) 04/01/2021   16:38:49  (  71.06, -72.02)    2.65                69
 04/01/2021   17:28:22   ( -70.95,  95.40) 04/01/2021   17:28:19  ( -70.94,  95.43)    1.34                 3
 04/01/2021   18:19:01   (  70.63, -96.76) 04/01/2021   18:17:49  (  70.68, -97.32)   21.71                72
 04/04/2021   08:54:04   (  71.26,  43.49) 04/04/2021   08:55:15  (  71.18,  44.05)   21.69                71
 04/04/2021   09:44:42   ( -70.95,-148.66) 04/04/2021   09:44:47  ( -70.96,-148.66)    1.29                 5
 04/04/2021   10:35:25   (  70.84,  18.83) 04/04/2021   10:34:14  (  70.86,  18.82)    1.88                71
 04/07/2021   01:10:28   (  71.52, 158.96) 04/07/2021   01:11:38  (  71.41, 160.29)   48.62                70
 04/07/2021   02:01:01   ( -70.95, -32.73) 04/07/2021   02:01:14  ( -70.97, -32.77)    2.83                13
 04/07/2021   02:51:44   (  70.84, 134.76) 04/07/2021   02:50:41  (  70.87, 134.71)    3.07                63
 04/09/2021   17:26:54   (  71.83, -85.68) 04/09/2021   17:28:00  (  71.73, -83.29)   83.84                66
 04/09/2021   18:17:22   ( -71.00,  83.11) 04/09/2021   18:17:42  ( -70.98,  83.12)    2.81                20
 04/09/2021   19:08:05   (  70.90,-109.40) 04/09/2021   19:07:09  (  70.87,-109.41)    3.32                56
 04/12/2021   10:33:42   ( -71.01,-160.96) 04/12/2021   10:34:10  ( -70.98,-161.00)    3.35                28
 04/12/2021   11:24:25   (  70.90,   6.53) 04/12/2021   11:23:36  (  70.92,   6.55)    2.32                49