Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 12 13.  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)
 12/15/2020   10:21:12   (  71.28,  21.07) 12/15/2020   10:22:21  (  71.22,  22.53)   52.83                69
 12/15/2020   11:11:45   ( -70.73,-170.67) 12/15/2020   11:11:58  ( -70.73,-170.60)    2.53                13
 12/15/2020   12:02:27   (  70.61,  -3.16) 12/15/2020   12:01:24  (  70.62,  -3.11)    2.50                63
 12/18/2020   02:37:38   (  71.58, 136.46) 12/18/2020   02:38:44  (  71.47, 138.83)   84.16                66
 12/18/2020   03:28:05   ( -70.72, -54.72) 12/18/2020   03:28:26  ( -70.71, -54.74)    0.82                21
 12/18/2020   04:18:48   (  70.59, 112.79) 12/18/2020   04:17:53  (  70.61, 112.74)    2.39                55
 12/20/2020   19:44:27   ( -70.76,  61.13) 12/20/2020   19:44:54  ( -70.75,  61.19)    2.60                27
 12/20/2020   20:35:10   (  70.63,-131.35) 12/20/2020   20:34:21  (  70.64,-131.33)    1.00                49
 12/23/2020   12:00:48   ( -70.75, 177.07) 12/23/2020   12:01:22  ( -70.78, 177.12)    3.25                34
 12/23/2020   12:51:31   (  70.63, -15.41) 12/23/2020   12:50:50  (  70.61, -15.49)    3.30                41
 12/26/2020   04:17:08   ( -70.75, -67.00) 12/26/2020   04:17:50  ( -70.75, -67.05)    1.68                42
 12/26/2020   05:07:52   (  70.68, 100.43) 12/26/2020   05:07:16  (  70.69, 100.51)    3.03                36