Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2021 9 5.  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)
 09/13/2021   12:46:07   (  77.92, -32.40) 09/13/2021   12:47:12  (  77.88, -28.70)   86.32                65
 09/13/2021   13:36:48   ( -77.81, 135.48) 09/13/2021   13:37:56  ( -77.79, 138.19)   63.80                68
 09/13/2021   14:27:28   (  77.60, -56.16) 09/13/2021   14:28:41  (  77.56, -55.50)   16.30                73
 09/13/2021   15:18:10   ( -77.53, 111.49) 09/13/2021   15:19:24  ( -77.51, 111.61)    3.47                74
 09/13/2021   16:08:55   (  77.52, -81.15) 09/13/2021   16:10:04  (  77.50, -81.12)    2.65                69
 09/13/2021   16:59:38   ( -77.49,  86.30) 09/13/2021   17:00:46  ( -77.49,  86.18)    2.99                68
 09/13/2021   17:50:24   (  77.52,-106.53) 09/13/2021   17:51:25  (  77.52,-106.36)    4.17                61
 09/13/2021   18:41:07   ( -77.49,  60.92) 09/13/2021   18:42:07  ( -77.51,  60.94)    2.15                60
 09/13/2021   19:31:52   (  77.48,-131.72) 09/13/2021   19:32:47  (  77.50,-131.79)    2.31                55
 09/13/2021   20:22:36   ( -77.50,  35.53) 09/13/2021   20:23:29  ( -77.49,  35.51)    0.77                53
 09/13/2021   21:13:21   (  77.49,-157.11) 09/13/2021   21:14:09  (  77.48,-157.22)    2.85                48
 09/13/2021   22:04:05   ( -77.50,  10.15) 09/13/2021   22:04:50  ( -77.52,  10.27)    3.36                45
 09/13/2021   22:54:50   (  77.49, 177.51) 09/13/2021   22:55:30  (  77.50, 177.54)    1.46                40
 09/13/2021   23:45:34   ( -77.50, -15.24) 09/13/2021   23:46:12  ( -77.50, -15.16)    2.11                38
 09/14/2021   00:36:19   (  77.49, 152.12) 09/14/2021   00:36:52  (  77.48, 152.11)    1.45                33
 09/14/2021   01:27:03   ( -77.51, -40.62) 09/14/2021   01:27:34  ( -77.48, -40.59)    3.67                31
 09/14/2021   02:17:48   (  77.50, 126.74) 09/14/2021   02:18:13  (  77.50, 126.87)    3.32                25
 09/14/2021   03:08:31   ( -77.47, -65.82) 09/14/2021   03:08:55  ( -77.50, -65.83)    3.29                24
 09/14/2021   03:59:17   (  77.50, 101.35) 09/14/2021   03:59:35  (  77.48, 101.44)    2.87                18
 09/14/2021   04:50:00   ( -77.47, -91.20) 09/14/2021   04:50:17  ( -77.48, -91.26)    1.55                17
 09/14/2021   05:40:45   (  77.46,  76.16) 09/14/2021   05:40:57  (  77.46,  76.01)    3.59                12
 09/14/2021   06:31:29   ( -77.48,-116.59) 09/14/2021   06:31:39  ( -77.46,-116.69)    3.15                10
 09/14/2021   07:22:14   (  77.47,  50.77) 09/14/2021   07:22:18  (  77.49,  50.77)    2.35                 4
 09/14/2021   08:12:58   ( -77.48,-141.97) 09/14/2021   08:13:00  ( -77.48,-141.93)    1.04                 2
 09/14/2021   09:03:43   (  77.47,  25.39) 09/14/2021   09:03:40  (  77.47,  25.34)    1.20                 3
 09/14/2021   09:54:27   ( -77.48,-167.36) 09/14/2021   09:54:22  ( -77.46,-167.36)    2.41                 5
 09/14/2021   10:45:12   (  77.47,   0.00) 09/14/2021   10:45:01  (  77.49,   0.10)    3.00                11
 09/14/2021   11:35:56   ( -77.49, 167.26) 09/14/2021   11:35:43  ( -77.48, 167.40)    3.46                13
 09/14/2021   12:26:41   (  77.48, -25.38) 09/14/2021   12:26:23  (  77.47, -25.33)    1.46                18
 09/14/2021   13:17:24   ( -77.45, 142.06) 09/14/2021   13:17:05  ( -77.46, 141.97)    2.90                19
 09/14/2021   14:08:10   (  77.48, -50.77) 09/14/2021   14:07:45  (  77.45, -50.76)    3.39                25
 09/14/2021   14:58:53   ( -77.45, 116.68) 09/14/2021   14:58:27  ( -77.44, 116.54)    3.40                26
 09/14/2021   15:49:38   (  77.44, -75.96) 09/14/2021   15:49:06  (  77.47, -76.00)    3.63                32
 09/14/2021   16:40:22   ( -77.45,  91.29) 09/14/2021   16:39:48  ( -77.47,  91.30)    1.39                34
 09/14/2021   17:31:07   (  77.44,-101.35) 09/14/2021   17:30:28  (  77.45,-101.43)    2.23                39
 09/14/2021   18:21:51   ( -77.46,  65.91) 09/14/2021   18:21:10  ( -77.45,  65.87)    1.52                41
 09/14/2021   19:12:36   (  77.45,-126.73) 09/14/2021   19:11:49  (  77.47,-126.67)    3.35                47
 09/14/2021   20:03:20   ( -77.46,  40.52) 09/14/2021   20:02:31  ( -77.47,  40.63)    2.77                49
 09/14/2021   20:54:05   (  77.45,-152.12) 09/14/2021   20:53:11  (  77.45,-152.10)    0.53                54
 09/14/2021   21:44:49   ( -77.46,  15.14) 09/14/2021   21:43:53  ( -77.45,  15.20)    2.30                56
 09/14/2021   22:35:34   (  77.45,-177.50) 09/14/2021   22:34:33  (  77.43,-177.53)    2.37                61
 09/14/2021   23:26:17   ( -77.43, -10.06) 09/14/2021   23:25:15  ( -77.43, -10.23)    4.15                62
 09/15/2021   00:17:03   (  77.46, 157.11) 09/15/2021   00:15:54  (  77.46, 157.23)    2.78                69
 09/15/2021   01:07:46   ( -77.43, -35.44) 09/15/2021   01:06:36  ( -77.45, -35.47)    2.63                70
 09/15/2021   01:58:31   (  77.42, 131.92) 09/15/2021   01:57:17  (  77.39, 131.61)    8.01                74
 09/15/2021   02:49:13   ( -77.35, -60.44) 09/15/2021   02:48:00  ( -77.34, -61.27)   20.04                73
 09/15/2021   03:39:52   (  77.08, 108.04) 09/15/2021   03:38:46  (  77.06, 104.92)   77.68                66
 09/15/2021   04:30:34   ( -77.01, -84.35) 09/15/2021   04:29:29  ( -77.02, -87.94)   89.92                65