Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 11.  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)
 07/12/2020   22:17:50   ( -70.62,  22.43) 07/12/2020   22:18:58  ( -70.63,  22.44)    0.59                68
 07/12/2020   23:08:33   (  70.50,-170.07) 07/12/2020   23:08:25  (  70.53,-170.07)    2.64                 8
 07/12/2020   23:59:11   ( -70.20,  -2.27) 07/12/2020   23:57:58  ( -70.25,  -2.84)   22.34                73
 07/15/2020   14:34:15   ( -70.71, 138.20) 07/15/2020   14:35:27  ( -70.68, 138.40)    8.02                72
 07/15/2020   15:24:57   (  70.55, -54.22) 07/15/2020   15:24:55  (  70.53, -54.19)    2.27                 2
 07/15/2020   16:15:38   ( -70.39, 113.34) 07/15/2020   16:14:25  ( -70.42, 113.28)    3.47                73
 07/18/2020   06:50:43   ( -70.96,-106.30) 07/18/2020   06:51:54  ( -70.85,-105.47)   32.50                71
 07/18/2020   07:41:20   (  70.53,  61.71) 07/18/2020   07:41:25  (  70.53,  61.69)    1.20                 5
 07/18/2020   08:32:02   ( -70.43,-130.81) 07/18/2020   08:30:55  ( -70.42,-130.84)    1.74                67
 07/20/2020   23:07:10   ( -71.20,   9.20) 07/20/2020   23:08:19  ( -71.06,  10.75)   57.91                69
 07/20/2020   23:57:42   (  70.52, 177.64) 07/20/2020   23:57:54  (  70.52, 177.56)    2.97                12
 07/21/2020   00:48:25   ( -70.47, -14.96) 07/21/2020   00:47:23  ( -70.47, -14.88)    2.83                62
 07/23/2020   15:23:37   ( -71.39, 124.77) 07/23/2020   15:24:44  ( -71.32, 127.05)   81.45                67
 07/23/2020   16:14:06   (  70.56, -66.51) 07/23/2020   16:14:23  (  70.56, -66.49)    0.85                17
 07/23/2020   17:04:48   ( -70.45, 100.98) 07/23/2020   17:03:53  ( -70.46, 100.99)    0.92                55