Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 11 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)
 11/22/2019   18:17:12   (  70.62, -97.78) 11/22/2019   18:18:23  (  70.57, -97.41)   14.43                71
 11/22/2019   19:07:51   ( -70.36,  69.95) 11/22/2019   19:07:55  ( -70.35,  69.90)    2.21                 4
 11/22/2019   19:58:34   (  70.24,-122.56) 11/22/2019   19:57:22  (  70.25,-122.61)    2.18                72
 11/25/2019   10:33:39   (  70.69,  17.99) 11/25/2019   10:34:50  (  70.63,  18.56)   22.12                71
 11/25/2019   11:24:17   ( -70.38,-174.19) 11/25/2019   11:24:23  ( -70.36,-174.21)    2.35                 6
 11/25/2019   12:15:00   (  70.27,  -6.70) 11/25/2019   12:13:50  (  70.25,  -6.72)    1.74                70
 11/28/2019   02:50:06   (  70.77, 133.76) 11/28/2019   02:51:17  (  70.69, 134.53)   29.95                71
 11/28/2019   03:40:42   ( -70.36, -58.26) 11/28/2019   03:40:51  ( -70.37, -58.32)    2.55                 9
 11/28/2019   04:31:24   (  70.24, 109.24) 11/28/2019   04:30:17  (  70.25, 109.17)    2.99                67
 11/30/2019   19:06:32   (  70.85,-110.48) 11/30/2019   19:07:43  (  70.74,-109.51)   37.93                71
 11/30/2019   19:57:07   ( -70.39,  57.59) 11/30/2019   19:57:18  ( -70.37,  57.57)    2.43                11
 11/30/2019   20:47:50   (  70.27,-134.91) 11/30/2019   20:46:45  (  70.25,-134.95)    2.62                65
 12/03/2019   11:22:59   (  70.94,   5.27) 12/03/2019   11:24:09  (  70.84,   6.53)   47.16                70
 12/03/2019   12:13:32   ( -70.37, 173.52) 12/03/2019   12:13:46  ( -70.36, 173.44)    2.95                14
 12/03/2019   13:04:16   (  70.30, -19.07) 12/03/2019   13:03:12  (  70.30, -19.00)    2.59                64