Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 6 22.  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)
 06/23/2021   20:26:32   (  71.16,-128.93) 06/23/2021   20:27:33  (  71.17,-128.93)    0.40                61
 06/23/2021   21:17:13   ( -71.05,  38.58) 06/23/2021   21:17:03  ( -71.05,  38.52)    2.25                10
 06/23/2021   22:07:47   (  70.43,-153.09) 06/23/2021   22:06:38  (  70.52,-154.65)   58.73                69
 06/26/2021   12:42:51   (  71.18, -13.01) 06/26/2021   12:44:02  (  71.20, -12.99)    2.81                71
 06/26/2021   13:33:32   ( -71.06, 154.51) 06/26/2021   13:33:32  ( -71.08, 154.46)    3.12                 0
 06/26/2021   14:24:13   (  70.81, -37.77) 06/26/2021   14:23:01  (  70.88, -38.22)   17.89                72
 06/29/2021   04:59:17   (  71.55, 102.26) 06/29/2021   05:00:27  (  71.45, 103.30)   38.45                70
 06/29/2021   05:49:52   ( -71.12, -89.65) 06/29/2021   05:50:01  ( -71.12, -89.60)    1.85                 9
 06/29/2021   06:40:34   (  70.99,  77.89) 06/29/2021   06:39:27  (  71.02,  77.88)    3.65                67
 07/01/2021   21:15:42   (  71.93,-142.50) 07/01/2021   21:16:49  (  71.80,-140.23)   79.79                67
 07/01/2021   22:06:10   ( -71.13,  26.27) 07/01/2021   22:06:29  ( -71.15,  26.33)    2.99                19
 07/01/2021   22:56:53   (  71.00,-166.20) 07/01/2021   22:55:57  (  70.99,-166.28)    3.04                56
 07/04/2021   14:22:29   ( -71.14, 142.20) 07/04/2021   14:22:59  ( -71.12, 142.17)    2.26                30
 07/04/2021   15:13:12   (  71.02, -50.29) 07/04/2021   15:12:26  (  71.01, -50.36)    2.60                46