Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 10 12.  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   (  71.54, -16.01) 10/14/2021   12:56:50  (  71.49, -15.64)   14.54                71
 10/14/2021   13:46:17   ( -71.29, 151.76) 10/14/2021   13:46:21  ( -71.31, 151.71)    3.05                 4
 10/14/2021   14:37:01   (  71.19, -40.75) 10/14/2021   14:35:48  (  71.22, -40.80)    4.31                73
 10/17/2021   05:12:04   (  71.94,  99.21) 10/17/2021   05:13:13  (  71.84, 100.82)   56.96                69
 10/17/2021   06:02:35   ( -71.32, -92.34) 10/17/2021   06:02:50  ( -71.34, -92.37)    2.89                15
 10/17/2021   06:53:19   (  71.22,  75.15) 10/17/2021   06:52:17  (  71.25,  75.12)    3.33                62
 10/19/2021   22:18:53   ( -71.34,  23.56) 10/19/2021   22:19:19  ( -71.36,  23.55)    2.09                26
 10/19/2021   23:09:37   (  71.25,-168.96) 10/19/2021   23:08:46  (  71.26,-168.97)    1.54                51
 10/22/2021   14:35:11   ( -71.37, 139.46) 10/22/2021   14:35:48  ( -71.38, 139.45)    0.57                37
 10/22/2021   15:25:55   (  71.29, -53.07) 10/22/2021   15:25:15  (  71.28, -53.07)    1.12                40
 10/25/2021   06:51:28   ( -71.41,-104.64) 10/25/2021   06:52:16  ( -71.39,-104.66)    2.20                48
 10/25/2021   07:42:11   (  71.27,  62.90) 10/25/2021   07:41:43  (  71.28,  62.82)    3.20                28