Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 6 20.  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)
 06/21/2020   11:16:13   (  71.20,   6.85) 06/21/2020   11:17:21  (  71.10,   8.50)   60.13                68
 06/21/2020   12:06:44   ( -70.55, 175.25) 06/21/2020   12:06:59  ( -70.55, 175.29)    1.43                15
 06/21/2020   12:57:28   (  70.46, -17.29) 06/21/2020   12:56:26  (  70.46, -17.21)    3.06                62
 06/24/2020   03:32:41   (  71.44, 122.34) 06/24/2020   03:33:47  (  71.35, 124.77)   86.92                66
 06/24/2020   04:23:07   ( -70.53, -68.80) 06/24/2020   04:23:30  ( -70.53, -68.87)    2.63                23
 06/24/2020   05:13:51   (  70.44,  98.64) 06/24/2020   05:12:57  (  70.43,  98.62)    2.00                54
 06/26/2020   20:39:31   ( -70.56,  47.06) 06/26/2020   20:40:00  ( -70.56,  47.05)    0.67                29
 06/26/2020   21:30:14   (  70.43,-145.42) 06/26/2020   21:29:27  (  70.45,-145.46)    3.20                47
 06/29/2020   12:55:55   ( -70.59, 162.93) 06/29/2020   12:56:30  ( -70.58, 162.96)    1.50                35
 06/29/2020   13:46:38   (  70.46, -29.56) 06/29/2020   13:45:57  (  70.47, -29.55)    1.05                41
 07/02/2020   05:12:18   ( -70.62, -81.21) 07/02/2020   05:12:59  ( -70.60, -81.13)    3.58                41
 07/02/2020   06:03:01   (  70.50,  86.29) 07/02/2020   06:02:26  (  70.49,  86.35)    2.57                35