Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 14.  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)
 11/15/2021   17:52:28   (  71.49, -89.86) 11/15/2021   17:53:25  (  71.48, -89.81)    1.80                57
 11/15/2021   18:43:09   ( -71.35,  77.71) 11/15/2021   18:42:55  ( -71.36,  77.63)    3.07                14
 11/15/2021   19:33:40   (  70.61,-113.72) 11/15/2021   19:32:33  (  70.66,-115.82)   77.73                67
 11/18/2021   10:08:45   (  71.50,  26.06) 11/18/2021   10:09:52  (  71.52,  26.14)    3.29                67
 11/18/2021   10:59:27   ( -71.41,-166.45) 11/18/2021   10:59:22  ( -71.41,-166.41)    1.62                 5
 11/18/2021   11:50:05   (  71.04,   1.51) 11/18/2021   11:48:53  (  71.09,   0.72)   28.72                72
 11/21/2021   02:25:06   (  71.73, 141.60) 11/21/2021   02:26:18  (  71.61, 142.18)   24.19                72
 11/21/2021   03:15:44   ( -71.43, -50.53) 11/21/2021   03:15:49  ( -71.45, -50.46)    3.40                 5
 11/21/2021   04:06:27   (  71.32, 116.97) 11/21/2021   04:05:16  (  71.34, 117.02)    2.74                71
 11/23/2021   18:41:30   (  72.12,-103.17) 11/23/2021   18:42:38  (  72.02,-101.23)   67.15                68
 11/23/2021   19:32:00   ( -71.45,  65.40) 11/23/2021   19:32:16  ( -71.43,  65.40)    1.70                16
 11/23/2021   20:22:43   (  71.35,-127.11) 11/23/2021   20:21:43  (  71.32,-127.13)    2.90                60
 11/26/2021   11:48:17   ( -71.47,-178.69) 11/26/2021   11:48:43  ( -71.46,-178.66)    1.08                26
 11/26/2021   12:39:00   (  71.37, -11.21) 11/26/2021   12:38:10  (  71.35, -11.20)    2.71                50