Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 15.  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)
 07/15/2020   14:34:15   ( -70.72, 138.19) 07/15/2020   14:35:27  ( -70.69, 138.40)    8.68                72
 07/15/2020   15:24:57   (  70.55, -54.22) 07/15/2020   15:24:55  (  70.54, -54.18)    2.16                 2
 07/15/2020   16:15:38   ( -70.40, 113.33) 07/15/2020   16:14:25  ( -70.42, 113.28)    2.62                73
 07/18/2020   06:50:42   ( -70.97,-106.32) 07/18/2020   06:51:53  ( -70.85,-105.46)   33.72                71
 07/18/2020   07:41:19   (  70.54,  61.70) 07/18/2020   07:41:24  (  70.53,  61.70)    0.91                 5
 07/18/2020   08:32:01   ( -70.44,-130.83) 07/18/2020   08:30:54  ( -70.42,-130.83)    2.54                67
 07/20/2020   23:07:10   ( -71.22,   9.16) 07/20/2020   23:08:19  ( -71.07,  10.76)   59.73                69
 07/20/2020   23:57:42   (  70.54, 177.62) 07/20/2020   23:57:54  (  70.53, 177.57)    1.86                12
 07/21/2020   00:48:24   ( -70.44, -14.90) 07/21/2020   00:47:24  ( -70.42, -14.95)    2.61                60
 07/23/2020   15:23:37   ( -71.42, 124.72) 07/23/2020   15:24:44  ( -71.33, 127.06)   83.78                67
 07/23/2020   16:14:06   (  70.59, -66.55) 07/23/2020   16:14:23  (  70.58, -66.47)    3.11                17
 07/23/2020   17:04:48   ( -70.48, 100.93) 07/23/2020   17:03:53  ( -70.47, 101.00)    2.95                55
 07/26/2020   08:30:29   (  70.59,  49.36) 07/26/2020   08:30:53  (  70.57,  49.39)    2.51                24
 07/26/2020   09:21:11   ( -70.48,-143.15) 07/26/2020   09:20:23  ( -70.46,-143.13)    2.12                48
 07/29/2020   00:46:51   (  70.59, 165.27) 07/29/2020   00:47:21  (  70.61, 165.34)    3.31                30