Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2019 12 10.  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, -75.73) 12/20/2019   16:07:55  (  75.49, -73.25)   69.07                68
 12/20/2019   16:57:29   ( -75.45,  91.85) 12/20/2019   16:58:38  ( -75.44,  93.94)   58.35                69
 12/20/2019   17:48:11   (  75.29,-100.36) 12/20/2019   17:49:22  (  75.23, -99.35)   29.19                71
 12/20/2019   18:38:53   ( -75.20,  67.20) 12/20/2019   18:40:06  ( -75.14,  67.70)   16.01                73
 12/20/2019   19:29:36   (  75.09,-125.15) 12/20/2019   19:30:47  (  75.07,-125.16)    2.45                71
 12/20/2019   20:20:19   ( -75.06,  42.26) 12/20/2019   20:21:29  ( -75.07,  42.17)    3.08                70
 12/20/2019   21:11:05   (  75.09,-150.51) 12/20/2019   21:12:08  (  75.10,-150.42)    3.00                63
 12/20/2019   22:01:48   ( -75.05,  16.91) 12/20/2019   22:02:51  ( -75.05,  16.78)    3.68                63
 12/20/2019   22:52:34   (  75.08,-175.87) 12/20/2019   22:53:30  (  75.08,-175.81)    1.56                56
 12/20/2019   23:43:18   ( -75.09,  -8.59) 12/20/2019   23:44:12  ( -75.08,  -8.48)    3.31                54
 12/21/2019   00:34:03   (  75.08, 158.78) 12/21/2019   00:34:52  (  75.06, 158.79)    1.78                49
 12/21/2019   01:24:46   ( -75.04, -33.80) 12/21/2019   01:25:34  ( -75.06, -33.87)    3.16                48
 12/21/2019   02:15:32   (  75.07, 133.42) 12/21/2019   02:16:14  (  75.04, 133.40)    3.36                42
 12/21/2019   03:06:15   ( -75.04, -59.16) 12/21/2019   03:06:56  ( -75.04, -59.27)    3.25                41
 12/21/2019   03:57:01   (  75.07, 108.07) 12/21/2019   03:57:35  (  75.07, 108.14)    2.13                34
 12/21/2019   04:47:45   ( -75.08, -84.65) 12/21/2019   04:48:17  ( -75.07, -84.53)    3.63                32
 12/21/2019   05:38:30   (  75.06,  82.71) 12/21/2019   05:38:57  (  75.05,  82.74)    1.38                27
 12/21/2019   06:29:14   ( -75.07,-110.01) 12/21/2019   06:29:39  ( -75.05,-109.92)    3.26                25
 12/21/2019   07:19:59   (  75.06,  57.35) 12/21/2019   07:20:19  (  75.03,  57.35)    2.58                20
 12/21/2019   08:10:42   ( -75.02,-135.23) 12/21/2019   08:11:01  ( -75.04,-135.32)    3.04                19
 12/21/2019   09:01:28   (  75.05,  32.00) 12/21/2019   09:01:40  (  75.06,  32.09)    2.86                12
 12/21/2019   09:52:11   ( -75.02,-160.58) 12/21/2019   09:52:23  ( -75.02,-160.71)    3.67                12
 12/21/2019   10:42:57   (  75.04,   6.64) 12/21/2019   10:43:02  (  75.04,   6.69)    1.48                 5
 12/21/2019   11:33:41   ( -75.06, 173.92) 12/21/2019   11:33:44  ( -75.05, 174.03)    3.34                 3
 12/21/2019   12:24:26   (  75.04, -18.71) 12/21/2019   12:24:24  (  75.02, -18.70)    1.89                 2
 12/21/2019   13:15:09   ( -75.00, 148.70) 12/21/2019   13:15:06  ( -75.03, 148.63)    3.10                 3
 12/21/2019   14:05:55   (  75.03, -44.07) 12/21/2019   14:05:46  (  75.00, -44.10)    3.50                 9
 12/21/2019   14:56:38   ( -75.00, 123.35) 12/21/2019   14:56:28  ( -75.01, 123.24)    3.21                10
 12/21/2019   15:47:24   (  75.03, -69.42) 12/21/2019   15:47:07  (  75.03, -69.36)    2.02                17
 12/21/2019   16:38:08   ( -75.04,  97.85) 12/21/2019   16:37:49  ( -75.04,  97.98)    3.65                19
 12/21/2019   17:28:53   (  75.02, -94.78) 12/21/2019   17:28:29  (  75.01, -94.75)    1.43                24
 12/21/2019   18:19:37   ( -75.04,  72.50) 12/21/2019   18:19:11  ( -75.02,  72.58)    3.33                26
 12/21/2019   19:10:22   (  75.02,-120.14) 12/21/2019   19:09:51  (  74.99,-120.15)    2.72                31
 12/21/2019   20:01:05   ( -74.98,  47.28) 12/21/2019   20:00:33  ( -75.00,  47.19)    2.97                32
 12/21/2019   20:51:51   (  75.01,-145.49) 12/21/2019   20:51:12  (  75.02,-145.41)    2.74                39
 12/21/2019   21:42:34   ( -74.98,  21.92) 12/21/2019   21:41:55  ( -74.98,  21.80)    3.63                39
 12/21/2019   22:33:19   (  75.01,-170.85) 12/21/2019   22:32:33  (  75.00,-170.80)    1.46                46
 12/21/2019   23:24:03   ( -75.02,  -3.57) 12/21/2019   23:23:15  ( -75.01,  -3.46)    3.40                48
 12/22/2019   00:14:48   (  75.00, 163.80) 12/22/2019   00:13:55  (  74.98, 163.81)    2.02                53
 12/22/2019   01:05:31   ( -74.97, -28.79) 12/22/2019   01:04:37  ( -74.99, -28.86)    3.00                54
 12/22/2019   01:56:17   (  75.00, 138.44) 12/22/2019   01:55:16  (  75.01, 138.55)    3.54                61
 12/22/2019   02:47:00   ( -74.96, -54.15) 12/22/2019   02:45:59  ( -74.97, -54.25)    3.14                61
 12/22/2019   03:37:46   (  74.99, 113.08) 12/22/2019   03:36:38  (  74.99, 113.15)    1.94                68
 12/22/2019   04:28:30   ( -75.01, -79.64) 12/22/2019   04:27:20  ( -75.00, -79.51)    3.71                70
 12/22/2019   05:19:15   (  74.99,  87.73) 12/22/2019   05:18:00  (  74.97,  87.76)    1.53                75
 12/22/2019   06:09:57   ( -74.90,-104.72) 12/22/2019   06:08:43  ( -74.93,-105.04)    9.62                74
 12/22/2019   07:00:38   (  74.69,  63.18) 12/22/2019   06:59:27  (  74.71,  61.70)   43.31                71
 12/22/2019   07:51:21   ( -74.66,-129.42) 12/22/2019   07:50:11  ( -74.62,-131.21)   53.15                70
 12/22/2019   08:42:01   (  74.40,  38.60) 12/22/2019   08:40:55  (  74.40,  35.55)   91.21                66
 12/22/2019   09:32:44   ( -74.36,-154.00) 12/22/2019   09:31:38  ( -74.36,-157.23)   96.88                66