Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 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)
 11/07/2021   17:03:37   (  71.42, -77.59) 11/07/2021   17:04:03  (  71.40, -77.59)    1.60                26
 11/07/2021   17:54:18   ( -71.30,  89.94) 11/07/2021   17:53:33  ( -71.28,  89.85)    3.33                45
 11/10/2021   09:19:54   (  71.43,  38.34) 11/10/2021   09:20:31  (  71.41,  38.31)    2.66                37
 11/10/2021   10:10:36   ( -71.35,-154.21) 11/10/2021   10:10:00  ( -71.35,-154.16)    1.88                36
 11/13/2021   01:36:11   (  71.45, 154.26) 11/13/2021   01:36:58  (  71.46, 154.27)    1.39                47
 11/13/2021   02:26:53   ( -71.36, -38.27) 11/13/2021   02:26:28  ( -71.35, -38.27)    1.71                25
 11/15/2021   17:52:28   (  71.46, -89.82) 11/15/2021   17:53:26  (  71.44, -89.86)    2.85                58
 11/15/2021   18:43:10   ( -71.37,  77.66) 11/15/2021   18:42:55  ( -71.39,  77.68)    1.91                15
 11/15/2021   19:33:41   (  70.64,-113.77) 11/15/2021   19:32:33  (  70.68,-115.78)   74.48                68
 11/18/2021   10:08:44   (  71.49,  26.10) 11/18/2021   10:09:52  (  71.47,  26.07)    1.63                68
 11/18/2021   10:59:26   ( -71.39,-166.41) 11/18/2021   10:59:22  ( -71.37,-166.47)    2.95                 4
 11/18/2021   11:50:04   (  71.02,   1.54) 11/18/2021   11:48:52  (  71.10,   0.74)   29.98                72