Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 30.  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   03:35:09   (  78.23, 103.71) 09/10/2021   03:33:54  (  78.26, 103.72)    2.89                75
 09/10/2021   04:25:53   ( -78.23, -89.00) 09/10/2021   04:24:53  ( -78.25, -89.07)    2.34                60
 09/10/2021   05:16:38   (  78.23,  78.32) 09/10/2021   05:15:54  (  78.27,  78.28)    3.68                44
 09/10/2021   06:07:22   ( -78.28,-114.60) 09/10/2021   06:06:52  ( -78.26,-114.51)    2.89                30
 09/10/2021   06:58:07   (  78.28,  52.71) 09/10/2021   06:57:53  (  78.27,  52.84)    2.89                14
 09/10/2021   07:48:51   ( -78.28,-139.99) 09/10/2021   07:48:52  ( -78.27,-139.95)    1.61                 1
 09/10/2021   08:39:36   (  78.28,  27.33) 09/10/2021   08:39:53  (  78.28,  27.40)    1.81                17
 09/10/2021   09:30:20   ( -78.28,-165.38) 09/10/2021   09:30:52  ( -78.28,-165.40)    0.91                32
 09/10/2021   10:21:05   (  78.28,   1.94) 09/10/2021   10:21:53  (  78.29,   1.96)    1.39                48
 09/10/2021   11:11:49   ( -78.29, 169.24) 09/10/2021   11:12:52  ( -78.28, 169.16)    1.76                63
 09/10/2021   12:02:39   (  78.48, -24.57) 09/10/2021   12:03:48  (  78.48, -22.31)   50.26                69