Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 6 25.  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)
 06/26/2020   20:39:31   ( -70.59,  47.02) 06/26/2020   20:39:59  ( -70.58,  47.08)    2.62                28
 06/26/2020   21:30:14   (  70.45,-145.46) 06/26/2020   21:29:27  (  70.43,-145.50)    3.08                47
 06/29/2020   12:55:54   ( -70.56, 162.97) 06/29/2020   12:56:30  ( -70.55, 162.92)    2.26                36
 06/29/2020   13:46:37   (  70.43, -29.52) 06/29/2020   13:45:57  (  70.45, -29.59)    3.07                40
 07/02/2020   05:12:18   ( -70.59, -81.17) 07/02/2020   05:13:00  ( -70.57, -81.17)    2.23                42
 07/02/2020   06:03:01   (  70.47,  86.34) 07/02/2020   06:02:27  (  70.47,  86.32)    0.69                34
 07/04/2020   21:28:40   ( -70.57,  34.78) 07/04/2020   21:29:29  ( -70.59,  34.74)    2.89                49
 07/04/2020   22:19:24   (  70.50,-157.81) 07/04/2020   22:18:56  (  70.48,-157.78)    2.53                28
 07/07/2020   13:45:04   ( -70.60, 150.64) 07/07/2020   13:45:59  ( -70.61, 150.64)    0.94                55
 07/07/2020   14:35:47   (  70.49, -41.87) 07/07/2020   14:35:26  (  70.50, -41.88)    1.28                21