Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 9 11.  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)
 09/12/2021   07:58:48   (  71.90,  57.32) 09/12/2021   07:59:56  (  71.83,  59.12)   62.88                68
 09/12/2021   08:49:19   ( -71.28,-134.22) 09/12/2021   08:49:34  ( -71.28,-134.16)    2.28                15
 09/12/2021   09:40:03   (  71.18,  33.26) 09/12/2021   09:39:01  (  71.18,  33.33)    2.81                62
 09/15/2021   01:05:37   ( -71.28, -18.28) 09/15/2021   01:06:04  ( -71.26, -18.31)    2.99                27
 09/15/2021   01:56:21   (  71.18, 149.20) 09/15/2021   01:55:31  (  71.16, 149.17)    2.97                50
 09/17/2021   17:21:55   ( -71.28,  97.67) 09/17/2021   17:22:33  ( -71.28,  97.61)    2.09                38
 09/17/2021   18:12:39   (  71.18, -94.86) 09/17/2021   18:12:00  (  71.18, -94.91)    1.99                39
 09/20/2021   09:38:12   ( -71.28,-146.39) 09/20/2021   09:39:01  ( -71.30,-146.48)    3.58                49
 09/20/2021   10:28:56   (  71.19,  21.08) 09/20/2021   10:28:28  (  71.20,  21.00)    3.25                28
 09/23/2021   01:54:31   ( -71.34, -30.55) 09/23/2021   01:55:30  ( -71.31, -30.58)    3.02                59
 09/23/2021   02:45:15   (  71.24, 136.93) 09/23/2021   02:44:56  (  71.26, 136.99)    2.90                19