Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 2.  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)
 07/02/2020   05:12:17   ( -70.57, -81.14) 07/02/2020   05:12:59  ( -70.59, -81.14)    1.99                42
 07/02/2020   06:03:01   (  70.50,  86.29) 07/02/2020   06:02:26  (  70.50,  86.36)    2.56                35
 07/04/2020   21:28:41   ( -70.61,  34.71) 07/04/2020   21:29:29  ( -70.61,  34.77)    1.88                48
 07/04/2020   22:19:24   (  70.49,-157.78) 07/04/2020   22:18:56  (  70.51,-157.74)    2.82                28
 07/07/2020   13:45:04   ( -70.59, 150.65) 07/07/2020   13:45:59  ( -70.62, 150.66)    3.10                55
 07/07/2020   14:35:47   (  70.48, -41.85) 07/07/2020   14:35:27  (  70.46, -41.92)    3.15                20
 07/07/2020   15:26:16   ( -69.70, 126.67) 07/07/2020   15:25:08  ( -69.75, 124.69)   76.37                68
 07/10/2020   06:01:27   ( -70.63, -93.50) 07/10/2020   06:02:28  ( -70.63, -93.44)    2.22                61
 07/10/2020   06:52:10   (  70.52,  73.99) 07/10/2020   06:51:55  (  70.53,  74.05)    2.13                15
 07/10/2020   07:42:43   ( -69.95,-117.80) 07/10/2020   07:41:33  ( -69.98,-119.11)   50.18                70
 07/12/2020   22:17:50   ( -70.62,  22.43) 07/12/2020   22:18:58  ( -70.64,  22.45)    2.05                68
 07/12/2020   23:08:33   (  70.51,-170.08) 07/12/2020   23:08:25  (  70.53,-170.07)    2.00                 8
 07/12/2020   23:59:11   ( -70.20,  -2.27) 07/12/2020   23:57:58  ( -70.26,  -2.83)   22.15                73
 07/15/2020   14:34:15   ( -70.72, 138.19) 07/15/2020   14:35:27  ( -70.70, 138.42)    8.72                72
 07/15/2020   15:24:56   (  70.51, -54.16) 07/15/2020   15:24:55  (  70.53, -54.18)    2.83                 1
 07/15/2020   16:15:38   ( -70.40, 113.33) 07/15/2020   16:14:25  ( -70.43, 113.30)    3.60                73