Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 10 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)
 10/21/2019   15:00:03   (  70.45, -48.22) 10/21/2019   15:00:45  (  70.43, -48.18)    2.31                42
 10/21/2019   15:50:44   ( -70.31, 119.31) 10/21/2019   15:50:15  ( -70.32, 119.28)    1.16                29
 10/24/2019   07:16:28   (  70.45,  67.66) 10/24/2019   07:17:13  (  70.44,  67.71)    2.10                45
 10/24/2019   08:07:09   ( -70.31,-124.80) 10/24/2019   08:06:43  ( -70.33,-124.82)    2.52                26
 10/26/2019   23:32:54   (  70.46,-176.45) 10/26/2019   23:33:42  (  70.45,-176.40)    2.24                48
 10/27/2019   00:23:36   ( -70.36,  -8.99) 10/27/2019   00:23:12  ( -70.34,  -8.93)    3.35                24
 10/29/2019   15:49:20   (  70.47, -60.57) 10/29/2019   15:50:11  (  70.45, -60.52)    2.63                51
 10/29/2019   16:40:02   ( -70.36, 106.90) 10/29/2019   16:39:41  ( -70.35, 106.96)    3.05                21
 10/29/2019   17:30:29   (  69.40, -84.34) 10/29/2019   17:29:22  (  69.46, -86.63)   89.69                67
 11/01/2019   08:05:45   (  70.42,  55.39) 11/01/2019   08:06:40  (  70.45,  55.36)    3.31                55
 11/01/2019   08:56:28   ( -70.37,-137.21) 11/01/2019   08:56:10  ( -70.35,-137.16)    3.19                18