Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 17.  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)
 11/18/2021   10:08:45   (  71.51,  26.06) 11/18/2021   10:09:52  (  71.52,  26.15)    3.61                67
 11/18/2021   10:59:27   ( -71.42,-166.46) 11/18/2021   10:59:22  ( -71.41,-166.41)    2.11                 5
 11/18/2021   11:50:05   (  71.04,   1.50) 11/18/2021   11:48:53  (  71.09,   0.73)   28.53                72
 11/21/2021   02:25:06   (  71.74, 141.60) 11/21/2021   02:26:18  (  71.61, 142.18)   24.60                72
 11/21/2021   03:15:44   ( -71.44, -50.54) 11/21/2021   03:15:49  ( -71.45, -50.46)    3.11                 5
 11/21/2021   04:06:27   (  71.33, 116.97) 11/21/2021   04:05:16  (  71.35, 117.02)    2.76                71
 11/23/2021   18:41:29   (  72.12,-103.18) 11/23/2021   18:42:37  (  72.02,-101.23)   67.73                68
 11/23/2021   19:32:00   ( -71.46,  65.38) 11/23/2021   19:32:16  ( -71.43,  65.39)    3.33                16
 11/23/2021   20:22:43   (  71.36,-127.13) 11/23/2021   20:21:43  (  71.32,-127.13)    3.71                60
 11/26/2021   11:48:16   ( -71.43,-178.62) 11/26/2021   11:48:43  ( -71.46,-178.67)    3.30                27
 11/26/2021   12:38:59   (  71.33, -11.13) 11/26/2021   12:38:10  (  71.35, -11.20)    2.90                49
 11/29/2021   04:04:33   ( -71.46, -62.72) 11/29/2021   04:05:10  ( -71.48, -62.75)    2.23                37
 11/29/2021   04:55:16   (  71.37, 104.76) 11/29/2021   04:54:37  (  71.37, 104.71)    1.71                39