Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 10.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2021   03:35:08   (  78.23, 103.74) 09/10/2021   03:33:54  (  78.24, 103.60)    3.42                74
 09/10/2021   04:25:52   ( -78.24, -89.02) 09/10/2021   04:24:52  ( -78.26, -89.01)    2.27                60
 09/10/2021   05:16:38   (  78.27,  78.13) 09/10/2021   05:15:54  (  78.25,  78.16)    2.51                44
 09/10/2021   06:07:21   ( -78.24,-114.40) 09/10/2021   06:06:52  ( -78.27,-114.45)    3.09                29
 09/10/2021   06:58:07   (  78.27,  52.74) 09/10/2021   06:57:54  (  78.26,  52.72)    1.83                13
 09/10/2021   07:48:51   ( -78.28,-140.01) 09/10/2021   07:48:52  ( -78.28,-139.89)    2.76                 1
 09/10/2021   08:39:36   (  78.27,  27.36) 09/10/2021   08:39:54  (  78.26,  27.28)    2.04                18
 09/10/2021   09:30:20   ( -78.29,-165.40) 09/10/2021   09:30:52  ( -78.29,-165.34)    1.39                32
 09/10/2021   10:21:05   (  78.28,   1.97) 09/10/2021   10:21:54  (  78.27,   1.84)    2.96                49
 09/10/2021   11:11:49   ( -78.29, 169.21) 09/10/2021   11:12:52  ( -78.29, 169.22)    0.49                63
 09/10/2021   12:02:40   (  78.51, -24.77) 09/10/2021   12:03:48  (  78.50, -22.20)   57.00                68
 09/23/2021   22:14:44   ( -78.19,   4.15) 09/23/2021   22:13:33  ( -78.22,   4.11)    3.51                71
 09/23/2021   23:05:30   (  78.22, 171.29) 09/23/2021   23:04:37  (  78.22, 171.36)    1.63                53
 09/23/2021   23:56:14   ( -78.23, -21.46) 09/23/2021   23:55:33  ( -78.23, -21.34)    2.76                41
 09/24/2021   00:46:59   (  78.22, 145.90) 09/24/2021   00:46:37  (  78.23, 145.92)    1.02                22
 09/24/2021   01:37:43   ( -78.23, -46.85) 09/24/2021   01:37:33  ( -78.24, -46.78)    1.45                10