Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 16.  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)
 08/16/2020   18:41:35   (  70.76,-103.61) 08/16/2020   18:42:47  (  70.71,-103.34)   11.42                72
 08/16/2020   19:32:14   ( -70.53,  64.08) 08/16/2020   19:32:18  ( -70.55,  64.04)    2.27                 4
 08/16/2020   20:22:58   (  70.45,-128.47) 08/16/2020   20:21:45  (  70.45,-128.47)    0.20                73
 08/19/2020   10:58:03   (  71.08,  11.77) 08/19/2020   10:59:13  (  70.94,  12.88)   43.31                70
 08/19/2020   11:48:36   ( -70.54, 179.99) 08/19/2020   11:48:48  ( -70.56, 179.94)    3.26                12
 08/19/2020   12:39:20   (  70.45, -12.56) 08/19/2020   12:38:15  (  70.46, -12.58)    0.75                65
 08/22/2020   03:14:31   (  71.35, 127.22) 08/22/2020   03:15:39  (  71.24, 129.24)   72.93                68
 08/22/2020   04:05:00   ( -70.60, -64.20) 08/22/2020   04:05:19  ( -70.60, -64.13)    2.30                19
 08/22/2020   04:55:43   (  70.46, 103.34) 08/22/2020   04:54:47  (  70.44, 103.27)    3.52                56
 08/24/2020   20:21:23   ( -70.60,  51.70) 08/24/2020   20:21:51  ( -70.61,  51.75)    1.68                28
 08/24/2020   21:12:07   (  70.52,-140.84) 08/24/2020   21:11:18  (  70.50,-140.77)    3.46                49
 08/27/2020   12:37:46   ( -70.61, 167.60) 08/27/2020   12:38:24  ( -70.59, 167.59)    3.24                38
 08/27/2020   13:28:29   (  70.47, -24.86) 08/27/2020   13:27:51  (  70.47, -24.94)    2.95                38