Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 18.  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)
 08/19/2020   10:58:03   (  71.07,  11.78) 08/19/2020   10:59:13  (  70.95,  12.89)   42.53                70
 08/19/2020   11:48:37   ( -70.58, 179.91) 08/19/2020   11:48:48  ( -70.57, 179.95)    1.86                11
 08/19/2020   12:39:20   (  70.44, -12.55) 08/19/2020   12:38:15  (  70.46, -12.56)    2.66                65
 08/22/2020   03:14:32   (  71.39, 127.15) 08/22/2020   03:15:39  (  71.26, 129.27)   76.62                67
 08/22/2020   04:05:00   ( -70.58, -64.18) 08/22/2020   04:05:20  ( -70.56, -64.19)    2.55                20
 08/22/2020   04:55:43   (  70.44, 103.36) 08/22/2020   04:54:47  (  70.45, 103.29)    2.79                56
 08/24/2020   20:21:23   ( -70.59,  51.73) 08/24/2020   20:21:52  ( -70.58,  51.71)    0.85                29
 08/24/2020   21:12:07   (  70.50,-140.82) 08/24/2020   21:11:19  (  70.47,-140.81)    2.78                48
 08/27/2020   12:37:45   ( -70.59, 167.64) 08/27/2020   12:38:24  ( -70.58, 167.57)    2.75                39
 08/27/2020   13:28:29   (  70.50, -24.91) 08/27/2020   13:27:50  (  70.52, -24.87)    2.62                39
 08/30/2020   04:54:08   ( -70.60, -76.46) 08/30/2020   04:54:57  ( -70.60, -76.53)    2.58                49
 08/30/2020   05:44:52   (  70.51,  91.00) 08/30/2020   05:44:24  (  70.49,  90.95)    2.63                28