Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 8 6.  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,  15.07) 08/08/2021   10:46:36  (  71.95,  17.64)   89.33                66
 08/08/2021   11:35:57   ( -71.21,-176.02) 08/08/2021   11:36:18  ( -71.19,-176.00)    1.62                21
 08/08/2021   12:26:40   (  71.10,  -8.52) 08/08/2021   12:25:45  (  71.09,  -8.51)    0.78                55
 08/11/2021   03:52:15   ( -71.19, -60.04) 08/11/2021   03:52:48  ( -71.20, -60.11)    2.88                33
 08/11/2021   04:42:57   (  71.08, 107.45) 08/11/2021   04:42:14  (  71.10, 107.37)    3.47                43
 08/13/2021   20:08:33   ( -71.22,  55.85) 08/13/2021   20:09:17  ( -71.20,  55.77)    3.21                44
 08/13/2021   20:59:17   (  71.17,-136.75) 08/13/2021   20:58:43  (  71.15,-136.67)    3.64                34
 08/16/2021   12:24:52   ( -71.25, 171.73) 08/16/2021   12:25:46  ( -71.25, 171.74)    0.27                54
 08/16/2021   13:15:35   (  71.15, -20.78) 08/16/2021   13:15:13  (  71.14, -20.80)    0.98                22
 08/16/2021   14:06:03   ( -70.32, 147.91) 08/16/2021   14:04:56  ( -70.34, 145.61)   86.39                67
 08/19/2021   04:41:11   ( -71.29, -72.39) 08/19/2021   04:42:15  ( -71.30, -72.31)    3.26                64
 08/19/2021   05:31:54   (  71.19,  95.10) 08/19/2021   05:31:42  (  71.19,  95.16)    1.92                12