Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 6 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)
 06/15/2021   19:37:35   (  71.08,-116.62) 06/15/2021   19:38:06  (  71.09,-116.70)    2.68                31
 06/15/2021   20:28:17   ( -71.03,  50.78) 06/15/2021   20:27:35  ( -71.02,  50.83)    2.48                42
 06/18/2021   11:53:55   (  71.14,  -0.78) 06/18/2021   11:54:35  (  71.13,  -0.74)    1.65                40
 06/18/2021   12:44:36   ( -71.03, 166.72) 06/18/2021   12:44:05  ( -71.02, 166.71)    2.10                31
 06/21/2021   04:10:13   (  71.15, 115.15) 06/21/2021   04:11:04  (  71.12, 115.12)    3.05                51
 06/21/2021   05:00:54   ( -71.03, -77.34) 06/21/2021   05:00:33  ( -71.06, -77.34)    3.03                21
 06/23/2021   20:26:32   (  71.16,-128.92) 06/23/2021   20:27:33  (  71.16,-128.93)    0.66                61
 06/23/2021   21:17:13   ( -71.04,  38.60) 06/23/2021   21:17:03  ( -71.05,  38.52)    3.21                10
 06/23/2021   22:07:47   (  70.43,-153.08) 06/23/2021   22:06:38  (  70.51,-154.66)   59.40                69
 06/26/2021   12:42:51   (  71.16, -13.00) 06/26/2021   12:44:02  (  71.19, -13.00)    3.31                71
 06/26/2021   13:33:33   ( -71.09, 154.45) 06/26/2021   13:33:32  ( -71.09, 154.46)    0.68                 1
 06/26/2021   14:24:13   (  70.80, -37.75) 06/26/2021   14:23:01  (  70.87, -38.22)   18.97                72