Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2019 12 7.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(METOP-A) METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2019   16:06:47   (  75.53, -75.72) 12/20/2019   16:07:55  (  75.49, -73.24)   69.18                68
 12/20/2019   16:57:30   ( -75.49,  91.71) 12/20/2019   16:58:39  ( -75.40,  93.81)   59.51                69
 12/20/2019   17:48:11   (  75.29,-100.36) 12/20/2019   17:49:22  (  75.24, -99.34)   29.26                71
 12/20/2019   18:38:53   ( -75.20,  67.21) 12/20/2019   18:40:06  ( -75.14,  67.72)   15.93                73
 12/20/2019   19:29:36   (  75.09,-125.15) 12/20/2019   19:30:47  (  75.07,-125.15)    2.16                71
 12/20/2019   20:20:20   ( -75.10,  42.13) 12/20/2019   20:21:29  ( -75.08,  42.19)    3.32                69
 12/20/2019   21:11:05   (  75.09,-150.51) 12/20/2019   21:12:08  (  75.10,-150.41)    3.28                63
 12/20/2019   22:01:48   ( -75.05,  16.91) 12/20/2019   22:02:51  ( -75.06,  16.79)    3.55                63
 12/20/2019   22:52:34   (  75.08,-175.86) 12/20/2019   22:53:30  (  75.08,-175.80)    1.69                56
 12/20/2019   23:43:18   ( -75.09,  -8.58) 12/20/2019   23:44:12  ( -75.09,  -8.47)    3.32                54
 12/21/2019   00:34:03   (  75.07, 158.78) 12/21/2019   00:34:52  (  75.06, 158.80)    1.49                49
 12/21/2019   01:24:47   ( -75.09, -33.94) 12/21/2019   01:25:34  ( -75.07, -33.86)    3.03                47