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   (  70.82, 150.02) 12/10/2020   01:49:31  (  70.77, 150.08)    5.44                71
 12/10/2020   02:39:01   ( -70.68, -42.43) 12/10/2020   02:39:01  ( -70.66, -42.46)    1.74                 0
 12/10/2020   03:29:42   (  70.45, 125.24) 12/10/2020   03:28:29  (  70.51, 124.95)   12.36                73
 12/12/2020   18:04:46   (  71.06, -94.47) 12/12/2020   18:05:57  (  70.93, -93.80)   28.01                71
 12/12/2020   18:55:23   ( -70.71,  73.44) 12/12/2020   18:55:29  ( -70.72,  73.50)    2.47                 6
 12/12/2020   19:46:06   (  70.59,-119.05) 12/12/2020   19:44:56  (  70.61,-119.01)    2.85                70
 12/15/2020   10:21:12   (  71.30,  21.04) 12/15/2020   10:22:21  (  71.19,  22.50)   53.40                69
 12/15/2020   11:11:44   ( -70.69,-170.61) 12/15/2020   11:11:58  ( -70.71,-170.63)    2.15                14
 12/15/2020   12:02:28   (  70.62,  -3.18) 12/15/2020   12:01:25  (  70.60,  -3.15)    2.95                63
 12/18/2020   02:37:38   (  71.54, 136.53) 12/18/2020   02:38:45  (  71.45, 138.79)   80.43                67
 12/18/2020   03:28:06   ( -70.73, -54.74) 12/18/2020   03:28:26  ( -70.75, -54.69)    3.13                20
 12/18/2020   04:18:49   (  70.61, 112.77) 12/18/2020   04:17:53  (  70.64, 112.79)    3.40                56
 12/20/2020   19:44:26   ( -70.72,  61.20) 12/20/2020   19:44:54  ( -70.73,  61.17)    2.00                28
 12/20/2020   20:35:09   (  70.59,-131.29) 12/20/2020   20:34:21  (  70.61,-131.36)    3.56                48