Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 12 5.  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)
 12/07/2020   09:31:58   (  70.76,  34.19) 12/07/2020   09:33:03  (  70.75,  34.16)    2.03                65
 12/07/2020   10:22:40   ( -70.67,-158.34) 12/07/2020   10:22:32  ( -70.69,-158.29)    2.85                 8
 12/07/2020   11:13:16   (  70.18,   9.74) 12/07/2020   11:12:05  (  70.26,   8.71)   39.63                71
 12/10/2020   01:48:20   (  70.79, 150.06) 12/10/2020   01:49:31  (  70.80, 150.12)    2.42                71
 12/10/2020   02:39:02   ( -70.70, -42.46) 12/10/2020   02:39:01  ( -70.69, -42.41)    2.05                 1
 12/10/2020   03:29:42   (  70.42, 125.29) 12/10/2020   03:28:30  (  70.48, 124.91)   15.39                72
 12/12/2020   18:04:46   (  71.03, -94.41) 12/12/2020   18:05:58  (  70.90, -93.84)   24.89                72
 12/12/2020   18:55:23   ( -70.67,  73.50) 12/12/2020   18:55:30  ( -70.69,  73.46)    2.11                 7
 12/12/2020   19:46:06   (  70.56,-119.00) 12/12/2020   19:44:57  (  70.58,-119.06)    3.27                69
 12/15/2020   10:21:11   (  71.27,  21.10) 12/15/2020   10:22:21  (  71.16,  22.44)   49.55                70
 12/15/2020   11:11:44   ( -70.70,-170.63) 12/15/2020   11:11:58  ( -70.68,-170.67)    3.38                14
 12/15/2020   12:02:27   (  70.59,  -3.13) 12/15/2020   12:01:25  (  70.56,  -3.20)    3.59                62
 12/18/2020   02:37:38   (  71.56, 136.51) 12/18/2020   02:38:45  (  71.41, 138.73)   80.24                67
 12/18/2020   03:28:06   ( -70.74, -54.76) 12/18/2020   03:28:26  ( -70.71, -54.74)    2.85                20
 12/18/2020   04:18:49   (  70.62, 112.74) 12/18/2020   04:17:53  (  70.60, 112.74)    2.40                56