Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 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)
 08/14/2020   02:25:09   (  70.62, 140.70) 08/14/2020   02:26:17  (  70.60, 140.62)    3.67                68
 08/14/2020   03:15:51   ( -70.55, -51.86) 08/14/2020   03:15:46  ( -70.55, -51.83)    0.96                 5
 08/14/2020   04:06:29   (  70.15, 116.08) 08/14/2020   04:05:17  (  70.23, 115.34)   29.40                72
 08/16/2020   18:41:34   (  70.73,-103.56) 08/16/2020   18:42:45  (  70.69,-103.37)    8.31                71
 08/16/2020   19:32:14   ( -70.55,  64.05) 08/16/2020   19:32:16  ( -70.53,  64.02)    2.76                 2
 08/16/2020   20:22:56   (  70.36,-128.33) 08/16/2020   20:21:43  (  70.42,-128.50)    8.95                73
 08/19/2020   10:58:01   (  70.94,  12.00) 08/19/2020   10:59:12  (  70.82,  12.72)   29.14                71
 08/19/2020   11:48:37   ( -70.55, 179.96) 08/19/2020   11:48:45  ( -70.56, 179.95)    0.99                 8
 08/19/2020   12:39:21   (  70.47, -12.59) 08/19/2020   12:38:12  (  70.44, -12.58)    2.46                69
 08/22/2020   03:14:27   (  71.15, 127.55) 08/22/2020   03:15:36  (  71.07, 128.98)   52.22                69
 08/22/2020   04:04:59   ( -70.55, -64.13) 08/22/2020   04:05:13  ( -70.59, -64.13)    3.70                14
 08/22/2020   04:55:43   (  70.47, 103.32) 08/22/2020   04:54:40  (  70.47, 103.35)    1.21                63
 08/24/2020   19:30:54   (  71.37,-116.90) 08/24/2020   19:32:02  (  71.26,-114.84)   74.70                68
 08/24/2020   20:21:22   ( -70.56,  51.77) 08/24/2020   20:21:43  ( -70.56,  51.72)    2.03                21
 08/24/2020   21:12:06   (  70.47,-140.78) 08/24/2020   21:11:09  (  70.50,-140.73)    3.26                57