Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 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)
 04/26/2020   04:41:05   ( -70.59, -73.54) 04/26/2020   04:41:49  ( -70.57, -73.58)    2.71                44
 04/26/2020   05:31:49   (  70.49,  93.93) 04/26/2020   05:31:16  (  70.46,  93.90)    3.28                33
 04/28/2020   20:57:29   ( -70.60,  42.36) 04/28/2020   20:58:16  ( -70.61,  42.36)    1.86                47
 04/28/2020   21:48:13   (  70.49,-150.17) 04/28/2020   21:47:43  (  70.50,-150.16)    0.76                30
 05/01/2020   13:13:53   ( -70.60, 158.26) 05/01/2020   13:14:44  ( -70.59, 158.21)    1.98                51
 05/01/2020   14:04:37   (  70.50, -34.26) 05/01/2020   14:04:11  (  70.48, -34.32)    2.76                26
 05/01/2020   14:55:02   ( -69.54, 134.51) 05/01/2020   14:53:56  ( -69.56, 132.02)   96.97                66
 05/04/2020   05:30:16   ( -70.60, -85.84) 05/04/2020   05:31:10  ( -70.63, -85.86)    2.83                54
 05/04/2020   06:21:00   (  70.50,  81.64) 05/04/2020   06:20:37  (  70.51,  81.61)    1.44                23
 05/04/2020   07:11:27   ( -69.65,-109.74) 05/04/2020   07:10:20  ( -69.70,-111.91)   83.91                67
 05/06/2020   21:46:40   ( -70.61,  30.06) 05/06/2020   21:47:38  ( -70.60,  29.98)    3.03                58
 05/06/2020   22:37:24   (  70.51,-162.47) 05/06/2020   22:37:04  (  70.54,-162.47)    3.42                20