Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 4.  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   (  78.26, 103.56) 09/10/2021   03:33:54  (  78.25, 103.67)    2.60                75
 09/10/2021   04:25:53   ( -78.26, -89.16) 09/10/2021   04:24:53  ( -78.24, -89.14)    3.02                60
 09/10/2021   05:16:38   (  78.26,  78.17) 09/10/2021   05:15:54  (  78.26,  78.23)    1.27                44
 09/10/2021   06:07:22   ( -78.27,-114.55) 09/10/2021   06:06:53  ( -78.25,-114.58)    2.42                29
 09/10/2021   06:58:07   (  78.26,  52.79) 09/10/2021   06:57:54  (  78.27,  52.79)    0.45                13
 09/10/2021   07:48:51   ( -78.27,-139.94) 09/10/2021   07:48:53  ( -78.26,-140.02)    2.55                 2
 09/10/2021   08:39:36   (  78.27,  27.40) 09/10/2021   08:39:54  (  78.28,  27.35)    1.58                18
 09/10/2021   09:30:20   ( -78.27,-165.33) 09/10/2021   09:30:53  ( -78.26,-165.47)    3.34                33
 09/10/2021   10:21:05   (  78.27,   2.01) 09/10/2021   10:21:54  (  78.29,   1.91)    2.91                49
 09/10/2021   11:11:49   ( -78.28, 169.28) 09/10/2021   11:12:52  ( -78.31, 169.32)    3.70                63
 09/10/2021   12:02:40   (  78.50, -24.73) 09/10/2021   12:03:49  (  78.47, -22.36)   52.60                69