Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 17.  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)
 07/18/2020   06:50:42   ( -70.96,-106.30) 07/18/2020   06:51:53  ( -70.86,-105.45)   32.59                71
 07/18/2020   07:41:19   (  70.53,  61.72) 07/18/2020   07:41:24  (  70.54,  61.72)    1.83                 5
 07/18/2020   08:32:01   ( -70.43,-130.81) 07/18/2020   08:30:54  ( -70.43,-130.82)    0.62                67
 07/20/2020   23:07:10   ( -71.20,   9.19) 07/20/2020   23:08:19  ( -71.08,  10.77)   58.43                69
 07/20/2020   23:57:42   (  70.52, 177.65) 07/20/2020   23:57:54  (  70.54, 177.59)    3.25                12
 07/21/2020   00:48:24   ( -70.42, -14.88) 07/21/2020   00:47:24  ( -70.43, -14.94)    2.66                60
 07/23/2020   15:23:37   ( -71.40, 124.76) 07/23/2020   15:24:44  ( -71.34, 127.08)   82.64                67
 07/23/2020   16:14:06   (  70.56, -66.51) 07/23/2020   16:14:24  (  70.54, -66.54)    3.13                18
 07/23/2020   17:04:48   ( -70.46, 100.97) 07/23/2020   17:03:53  ( -70.48, 101.02)    3.05                55
 07/26/2020   08:30:28   (  70.55,  49.41) 07/26/2020   08:30:52  (  70.58,  49.42)    3.19                24
 07/26/2020   09:21:10   ( -70.45,-143.10) 07/26/2020   09:20:22  ( -70.48,-143.11)    3.14                48
 07/29/2020   00:46:52   (  70.60, 165.25) 07/29/2020   00:47:22  (  70.57, 165.28)    3.03                30
 07/29/2020   01:37:34   ( -70.49, -27.26) 07/29/2020   01:36:52  ( -70.47, -27.24)    2.54                42