Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 22.  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)
 04/23/2020   12:24:41   ( -70.57, 170.59) 04/23/2020   12:25:22  ( -70.56, 170.52)    2.93                41
 04/23/2020   13:15:25   (  70.47, -21.94) 04/23/2020   13:14:49  (  70.45, -22.00)    3.42                36
 04/26/2020   04:41:05   ( -70.57, -73.51) 04/26/2020   04:41:49  ( -70.60, -73.54)    3.15                44
 04/26/2020   05:31:49   (  70.47,  93.96) 04/26/2020   05:31:16  (  70.49,  93.94)    1.55                33
 04/28/2020   20:57:29   ( -70.58,  42.39) 04/28/2020   20:58:17  ( -70.59,  42.32)    2.70                48
 04/28/2020   21:48:13   (  70.48,-150.14) 04/28/2020   21:47:44  (  70.47,-150.21)    2.77                29
 05/01/2020   13:13:53   ( -70.64, 158.20) 05/01/2020   13:14:43  ( -70.62, 158.25)    2.65                50
 05/01/2020   14:04:36   (  70.49, -34.25) 05/01/2020   14:04:10  (  70.50, -34.28)    2.21                26
 05/01/2020   14:55:01   ( -69.53, 134.53) 05/01/2020   14:53:55  ( -69.58, 132.05)   96.45                66
 05/04/2020   05:30:16   ( -70.60, -85.82) 05/04/2020   05:31:11  ( -70.60, -85.90)    3.00                55
 05/04/2020   06:21:01   (  70.55,  81.56) 05/04/2020   06:20:37  (  70.53,  81.64)    3.42                24