Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 8 7.  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)
 08/08/2021   10:45:30   (  72.08,  15.06) 08/08/2021   10:46:36  (  71.95,  17.63)   89.73                66
 08/08/2021   11:35:57   ( -71.21,-176.03) 08/08/2021   11:36:18  ( -71.19,-176.00)    2.72                21
 08/08/2021   12:26:40   (  71.11,  -8.53) 08/08/2021   12:25:45  (  71.09,  -8.52)    1.60                55
 08/11/2021   03:52:15   ( -71.20, -60.06) 08/11/2021   03:52:48  ( -71.20, -60.11)    1.94                33
 08/11/2021   04:42:58   (  71.09, 107.44) 08/11/2021   04:42:15  (  71.09, 107.37)    2.61                43
 08/13/2021   20:08:33   ( -71.23,  55.82) 08/13/2021   20:09:16  ( -71.25,  55.86)    2.48                43
 08/13/2021   20:59:16   (  71.13,-136.68) 08/13/2021   20:58:43  (  71.15,-136.67)    2.09                33
 08/16/2021   12:24:52   ( -71.27, 171.69) 08/16/2021   12:25:46  ( -71.25, 171.73)    2.91                54
 08/16/2021   13:15:35   (  71.17, -20.81) 08/16/2021   13:15:13  (  71.14, -20.80)    3.13                22
 08/16/2021   14:06:03   ( -70.34, 147.88) 08/16/2021   14:04:55  ( -70.39, 145.68)   82.35                68
 08/19/2021   04:41:10   ( -71.26, -72.34) 08/19/2021   04:42:16  ( -71.24, -72.40)    2.98                66
 08/19/2021   05:31:53   (  71.16,  95.15) 08/19/2021   05:31:42  (  71.19,  95.15)    2.97                11