Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 5 14.  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)
 05/14/2020   22:35:52   ( -70.70,  17.64) 05/14/2020   22:37:04  ( -70.68,  17.78)    5.53                72
 05/14/2020   23:26:35   (  70.53,-174.77) 05/14/2020   23:26:32  (  70.51,-174.82)    2.41                 3
 05/15/2020   00:17:15   ( -70.38,  -7.22) 05/15/2020   00:16:02  ( -70.41,  -7.33)    5.78                73
 05/17/2020   14:52:21   ( -70.97, 133.10) 05/17/2020   14:53:32  ( -70.88, 133.95)   32.56                71
 05/17/2020   15:42:59   (  70.54, -58.88) 05/17/2020   15:43:03  (  70.55, -58.90)    0.99                 4
 05/17/2020   16:33:40   ( -70.44, 108.59) 05/17/2020   16:32:33  ( -70.45, 108.59)    0.94                67
 05/20/2020   07:08:51   ( -71.29,-111.54) 05/20/2020   07:09:59  ( -71.18,-109.70)   66.95                68
 05/20/2020   07:59:22   (  70.55,  57.00) 05/20/2020   07:59:34  (  70.58,  57.02)    3.38                12
 05/20/2020   08:50:03   ( -70.45,-135.52) 05/20/2020   08:49:05  ( -70.43,-135.57)    2.91                58
 05/23/2020   00:15:46   (  70.57, 172.89) 05/23/2020   00:16:08  (  70.57, 172.85)    1.31                22
 05/23/2020   01:06:27   ( -70.46, -19.63) 05/23/2020   01:05:38  ( -70.48, -19.65)    1.62                49
 05/25/2020   16:32:10   (  70.58, -71.23) 05/25/2020   16:32:42  (  70.61, -71.23)    2.80                32
 05/25/2020   17:22:52   ( -70.53,  96.18) 05/25/2020   17:22:12  ( -70.52,  96.26)    3.31                40