Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 3 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)
 03/16/2021   14:59:39   (  70.94, -47.50) 03/16/2021   15:00:02  (  70.92, -47.49)    2.28                23
 03/16/2021   15:50:21   ( -70.85, 119.97) 03/16/2021   15:49:31  ( -70.86, 120.05)    2.84                50
 03/19/2021   07:15:59   (  70.93,  68.44) 03/19/2021   07:16:29  (  70.93,  68.41)    1.39                30
 03/19/2021   08:06:41   ( -70.84,-124.08) 03/19/2021   08:05:59  ( -70.81,-124.13)    3.19                42
 03/21/2021   23:32:20   (  70.98,-175.70) 03/21/2021   23:32:55  (  70.99,-175.62)    3.14                35
 03/22/2021   00:23:02   ( -70.88,  -8.21) 03/22/2021   00:22:25  ( -70.88,  -8.16)    2.10                37
 03/24/2021   15:48:39   (  70.98, -59.77) 03/24/2021   15:49:21  (  70.99, -59.74)    1.19                42
 03/24/2021   16:39:21   ( -70.87, 107.73) 03/24/2021   16:38:51  ( -70.88, 107.73)    0.65                30
 03/27/2021   08:04:59   (  70.98,  56.17) 03/27/2021   08:05:48  (  70.98,  56.13)    1.37                49
 03/27/2021   08:55:41   ( -70.87,-136.33) 03/27/2021   08:55:18  ( -70.87,-136.40)    2.55                23