Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 10 13.  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)
 10/14/2021   12:55:39   (  71.53, -15.99) 10/14/2021   12:56:50  (  71.50, -15.62)   13.32                71
 10/14/2021   13:46:18   ( -71.33, 151.69) 10/14/2021   13:46:21  ( -71.33, 151.73)    1.24                 3
 10/14/2021   14:37:01   (  71.17, -40.72) 10/14/2021   14:35:49  (  71.18, -40.86)    5.14                72
 10/17/2021   05:12:04   (  71.92,  99.24) 10/17/2021   05:13:13  (  71.85, 100.85)   56.17                69
 10/17/2021   06:02:36   ( -71.35, -92.40) 10/17/2021   06:02:50  ( -71.35, -92.35)    1.84                14
 10/17/2021   06:53:20   (  71.25,  75.08) 10/17/2021   06:52:17  (  71.26,  75.14)    2.20                63
 10/19/2021   22:18:54   ( -71.38,  23.50) 10/19/2021   22:19:19  ( -71.37,  23.56)    2.36                25
 10/19/2021   23:09:38   (  71.29,-169.02) 10/19/2021   23:08:46  (  71.28,-168.95)    2.82                52
 10/22/2021   14:35:10   ( -71.36, 139.49) 10/22/2021   14:35:47  ( -71.39, 139.46)    3.32                37
 10/22/2021   15:25:54   (  71.27, -53.04) 10/22/2021   15:25:14  (  71.29, -53.06)    1.94                40
 10/25/2021   06:51:28   ( -71.39,-104.61) 10/25/2021   06:52:16  ( -71.39,-104.65)    1.34                48
 10/25/2021   07:42:12   (  71.30,  62.85) 10/25/2021   07:41:43  (  71.29,  62.83)    1.91                29