Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 12 8.  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)
 12/10/2020   01:48:20   (  70.80, 150.05) 12/10/2020   01:49:31  (  70.80, 150.11)    2.46                71
 12/10/2020   02:39:01   ( -70.66, -42.40) 12/10/2020   02:39:01  ( -70.68, -42.43)    2.87                 0
 12/10/2020   03:29:42   (  70.43, 125.27) 12/10/2020   03:28:30  (  70.47, 124.90)   14.47                72
 12/12/2020   18:04:46   (  71.04, -94.43) 12/12/2020   18:05:57  (  70.95, -93.76)   26.20                71
 12/12/2020   18:55:23   ( -70.69,  73.47) 12/12/2020   18:55:30  ( -70.68,  73.45)    1.25                 7
 12/12/2020   19:46:06   (  70.57,-119.02) 12/12/2020   19:44:57  (  70.58,-119.06)    1.57                69
 12/15/2020   10:21:12   (  71.28,  21.07) 12/15/2020   10:22:21  (  71.21,  22.53)   52.78                69
 12/15/2020   11:11:45   ( -70.73,-170.66) 12/15/2020   11:11:58  ( -70.73,-170.60)    2.46                13
 12/15/2020   12:02:28   (  70.61,  -3.16) 12/15/2020   12:01:25  (  70.62,  -3.12)    2.06                63
 12/18/2020   02:37:37   (  71.53, 136.56) 12/18/2020   02:38:44  (  71.47, 138.82)   80.25                67
 12/18/2020   03:28:05   ( -70.71, -54.72) 12/18/2020   03:28:26  ( -70.71, -54.74)    0.73                21
 12/18/2020   04:18:48   (  70.59, 112.79) 12/18/2020   04:17:53  (  70.60, 112.74)    2.21                55
 12/20/2020   19:44:27   ( -70.76,  61.14) 12/20/2020   19:44:54  ( -70.75,  61.20)    2.31                27
 12/20/2020   20:35:10   (  70.63,-131.35) 12/20/2020   20:34:21  (  70.63,-131.33)    0.74                49