Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 30.  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)
 01/01/2020   23:14:08   ( -70.44,   8.27) 01/01/2020   23:15:00  ( -70.44,   8.21)    2.32                52
 01/02/2020   00:04:52   (  70.32, 175.76) 01/02/2020   00:04:27  (  70.33, 175.70)    2.51                25
 01/02/2020   00:55:18   ( -69.43, -15.58) 01/02/2020   00:54:11  ( -69.45, -17.89)   90.40                67
 01/04/2020   15:30:34   ( -70.48, 124.10) 01/04/2020   15:31:27  ( -70.50, 124.18)    3.67                53
 01/04/2020   16:21:18   (  70.37, -68.41) 01/04/2020   16:20:55  (  70.33, -68.42)    3.49                23
 01/04/2020   17:11:45   ( -69.53, 100.18) 01/04/2020   17:10:37  ( -69.57,  98.15)   79.23                68
 01/07/2020   07:46:59   ( -70.47,-119.99) 01/07/2020   07:47:56  ( -70.45,-120.01)    2.80                57
 01/07/2020   08:37:43   (  70.36,  47.50) 01/07/2020   08:37:23  (  70.33,  47.47)    2.88                20
 01/07/2020   09:28:12   ( -69.62,-144.06) 01/07/2020   09:27:03  ( -69.68,-145.82)   68.32                69
 01/10/2020   00:03:24   ( -70.46,  -4.07) 01/10/2020   00:04:24  ( -70.44,  -4.13)    2.95                60
 01/10/2020   00:54:08   (  70.35, 163.41) 01/10/2020   00:53:51  (  70.33, 163.34)    3.43                17
 01/10/2020   01:44:39   ( -69.72, -28.31) 01/10/2020   01:43:29  ( -69.79, -29.79)   57.66                70
 01/12/2020   16:19:49   ( -70.51, 111.76) 01/12/2020   16:20:50  ( -70.49, 111.82)    2.77                61
 01/12/2020   17:10:33   (  70.39, -80.76) 01/12/2020   17:10:17  (  70.38, -80.71)    2.88                16
 01/12/2020   18:01:05   ( -69.82,  87.45) 01/12/2020   17:59:54  ( -69.89,  86.24)   47.23                71