Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 7 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)
 07/23/2021   09:07:23   (  71.18,  41.05) 07/23/2021   09:07:50  (  71.15,  41.02)    3.36                27
 07/23/2021   09:58:05   ( -71.08,-151.47) 07/23/2021   09:57:19  ( -71.09,-151.44)    1.32                46
 07/26/2021   01:23:42   (  71.20, 156.94) 07/26/2021   01:24:20  (  71.18, 156.95)    3.22                38
 07/26/2021   02:14:24   ( -71.11, -35.57) 07/26/2021   02:13:49  ( -71.12, -35.51)    2.66                35
 07/28/2021   17:40:00   (  71.18, -87.07) 07/28/2021   17:40:50  (  71.20, -87.14)    2.95                50
 07/28/2021   18:30:43   ( -71.13,  80.33) 07/28/2021   18:30:19  ( -71.15,  80.41)    3.56                24
 07/31/2021   09:56:18   (  71.21,  28.81) 07/31/2021   09:57:19  (  71.22,  28.78)    1.54                61
 07/31/2021   10:47:00   ( -71.11,-163.69) 07/31/2021   10:46:49  ( -71.12,-163.75)    2.65                11
 07/31/2021   11:37:33   (  70.49,   4.66) 07/31/2021   11:36:24  (  70.57,   3.05)   60.59                69
 08/03/2021   02:12:37   (  71.25, 144.70) 08/03/2021   02:13:49  (  71.24, 144.68)    1.23                72
 08/03/2021   03:03:19   ( -71.14, -47.80) 08/03/2021   03:03:19  ( -71.14, -47.84)    1.70                 0
 08/03/2021   03:54:00   (  70.94, 119.86) 08/03/2021   03:52:47  (  70.97, 119.54)   12.22                73