Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 4.  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)
 11/04/2021   23:56:50   ( -72.18,  -2.28) 11/04/2021   23:57:57  ( -72.09,   0.06)   80.31                67
 11/05/2021   00:47:20   (  71.38, 166.52) 11/05/2021   00:47:35  (  71.41, 166.54)    3.00                15
 11/05/2021   01:38:02   ( -71.31, -26.04) 11/05/2021   01:37:05  ( -71.29, -26.02)    2.65                57
 11/07/2021   17:03:37   (  71.39, -77.54) 11/07/2021   17:04:03  (  71.42, -77.56)    3.42                26
 11/07/2021   17:54:19   ( -71.31,  89.91) 11/07/2021   17:53:33  ( -71.30,  89.89)    1.31                46
 11/10/2021   09:19:54   (  71.40,  38.39) 11/10/2021   09:20:31  (  71.42,  38.32)    3.26                37
 11/10/2021   10:10:36   ( -71.31,-154.14) 11/10/2021   10:10:01  ( -71.30,-154.23)    3.25                35
 11/13/2021   01:36:11   (  71.46, 154.23) 11/13/2021   01:36:57  (  71.46, 154.28)    1.65                46
 11/13/2021   02:26:53   ( -71.37, -38.29) 11/13/2021   02:26:27  ( -71.35, -38.27)    2.60                26
 11/15/2021   17:52:28   (  71.48, -89.84) 11/15/2021   17:53:24  (  71.48, -89.79)    1.88                56
 11/15/2021   18:43:10   ( -71.38,  77.65) 11/15/2021   18:42:54  ( -71.38,  77.67)    0.67                16