Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2022 1 15.  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)
 01/15/2022   11:35:02   ( -71.87,-175.73) 01/15/2022   11:36:14  ( -71.75,-175.13)   24.19                72
 01/15/2022   12:25:42   (  71.55,  -7.83) 01/15/2022   12:25:43  (  71.56,  -7.82)    0.71                 1
 01/15/2022   13:16:25   ( -71.43, 159.69) 01/15/2022   13:15:13  ( -71.43, 159.61)    2.88                72
 01/18/2022   03:02:08   (  71.66, 132.89) 01/18/2022   03:03:17  (  71.62, 132.89)    3.70                69
 01/18/2022   03:52:51   ( -71.53, -59.57) 01/18/2022   03:52:46  ( -71.56, -59.58)    2.63                 5
 01/18/2022   04:43:29   (  71.11, 108.48) 01/18/2022   04:42:18  (  71.19, 107.47)   37.40                71
 01/20/2022   18:29:17   ( -71.64,  81.15) 01/20/2022   18:30:20  ( -71.62,  81.12)    2.69                63
 01/20/2022   19:20:01   (  71.53,-111.34) 01/20/2022   19:19:47  (  71.52,-111.39)    2.17                14
 01/20/2022   20:10:34   ( -70.89,  57.09) 01/20/2022   20:09:25  ( -70.97,  55.36)   63.48                69
 01/23/2022   09:56:26   (  71.65,  29.37) 01/23/2022   09:57:19  (  71.63,  29.38)    2.18                53
 01/23/2022   10:47:09   ( -71.52,-163.09) 01/23/2022   10:46:49  ( -71.51,-163.17)    3.19                20
 01/26/2022   01:23:35   ( -71.64, -22.38) 01/26/2022   01:24:22  ( -71.61, -22.41)    3.21                47
 01/26/2022   02:14:19   (  71.53, 145.13) 01/26/2022   02:13:49  (  71.51, 145.07)    3.28                30
 01/28/2022   16:50:45   (  71.65, -74.17) 01/28/2022   16:51:21  (  71.65, -74.10)    2.41                36
 01/28/2022   17:41:28   ( -71.52,  93.37) 01/28/2022   17:40:51  ( -71.54,  93.35)    1.64                37