Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 10 19.  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, -48.23) 10/21/2019   15:00:45  (  70.43, -48.18)    2.64                42
 10/21/2019   15:50:44   ( -70.32, 119.31) 10/21/2019   15:50:15  ( -70.32, 119.29)    0.90                29
 10/24/2019   07:16:28   (  70.46,  67.66) 10/24/2019   07:17:13  (  70.44,  67.71)    2.51                45
 10/24/2019   08:07:09   ( -70.31,-124.80) 10/24/2019   08:06:43  ( -70.33,-124.82)    2.20                26
 10/26/2019   23:32:54   (  70.46,-176.46) 10/26/2019   23:33:42  (  70.45,-176.40)    2.78                48
 10/27/2019   00:23:35   ( -70.32,  -8.91) 10/27/2019   00:23:12  ( -70.34,  -8.92)    3.13                23
 10/29/2019   15:49:20   (  70.47, -60.58) 10/29/2019   15:50:11  (  70.45, -60.51)    3.32                51
 10/29/2019   16:40:01   ( -70.32, 106.98) 10/29/2019   16:39:41  ( -70.35, 106.97)    3.45                20
 10/29/2019   17:30:29   (  69.41, -84.35) 10/29/2019   17:29:22  (  69.47, -86.62)   89.01                67
 11/01/2019   08:05:45   (  70.43,  55.38) 11/01/2019   08:06:40  (  70.46,  55.37)    2.88                55
 11/01/2019   08:56:27   ( -70.32,-137.14) 11/01/2019   08:56:10  ( -70.35,-137.15)    3.13                17