Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 5 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)
 05/20/2020   07:08:47   ( -71.12,-111.25) 05/20/2020   07:09:57  ( -71.01,-109.87)   51.03                70
 05/20/2020   07:59:22   (  70.53,  57.03) 05/20/2020   07:59:31  (  70.53,  57.02)    0.98                 9
 05/20/2020   08:50:03   ( -70.44,-135.49) 05/20/2020   08:49:01  ( -70.42,-135.50)    1.97                62
 05/22/2020   23:25:16   ( -71.40,   4.18) 05/22/2020   23:26:23  ( -71.28,   6.42)   80.97                67
 05/23/2020   00:15:46   (  70.56, 172.91) 05/23/2020   00:16:01  (  70.57, 172.97)    2.71                15
 05/23/2020   01:06:27   ( -70.46, -19.61) 05/23/2020   01:05:31  ( -70.47, -19.55)    2.62                56
 05/25/2020   16:32:09   (  70.58, -71.22) 05/25/2020   16:32:31  (  70.58, -71.15)    2.87                22
 05/25/2020   17:22:50   ( -70.48,  96.26) 05/25/2020   17:22:01  ( -70.48,  96.34)    2.89                49
 05/28/2020   08:48:32   (  70.56,  44.73) 05/28/2020   08:49:03  (  70.55,  44.69)    1.53                31
 05/28/2020   09:39:13   ( -70.45,-147.78) 05/28/2020   09:38:33  ( -70.46,-147.83)    1.66                40
 05/31/2020   01:04:56   (  70.59, 160.59) 05/31/2020   01:05:34  (  70.60, 160.63)    2.11                38
 05/31/2020   01:55:37   ( -70.48, -31.91) 05/31/2020   01:55:04  ( -70.50, -31.88)    3.13                33