Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 10 31.  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)
 11/02/2021   07:40:26   ( -71.80,-117.51) 11/02/2021   07:41:37  ( -71.66,-116.57)   36.18                71
 11/02/2021   08:31:03   (  71.36,  50.61) 11/02/2021   08:31:08  (  71.35,  50.56)    1.78                 5
 11/02/2021   09:21:45   ( -71.29,-141.95) 11/02/2021   09:20:37  ( -71.28,-141.91)    1.70                68
 11/04/2021   23:56:51   ( -72.20,  -2.33) 11/04/2021   23:57:58  ( -72.06,   0.01)   81.53                67
 11/05/2021   00:47:20   (  71.36, 166.55) 11/05/2021   00:47:36  (  71.38, 166.49)    2.50                16
 11/05/2021   01:38:02   ( -71.29, -26.00) 11/05/2021   01:37:05  ( -71.31, -25.98)    3.10                57
 11/07/2021   17:03:38   (  71.42, -77.61) 11/07/2021   17:04:04  (  71.39, -77.60)    3.69                26
 11/07/2021   17:54:19   ( -71.34,  89.86) 11/07/2021   17:53:32  ( -71.33,  89.94)    2.94                47
 11/10/2021   09:19:54   (  71.44,  38.32) 11/10/2021   09:20:30  (  71.45,  38.38)    2.72                36
 11/10/2021   10:10:36   ( -71.35,-154.20) 11/10/2021   10:10:00  ( -71.35,-154.16)    1.42                36
 11/13/2021   01:36:11   (  71.45, 154.25) 11/13/2021   01:36:58  (  71.45, 154.27)    0.67                47
 11/13/2021   02:26:53   ( -71.36, -38.26) 11/13/2021   02:26:28  ( -71.35, -38.27)    1.35                25