Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 12.  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)
 09/23/2021   22:14:45   ( -78.21,   4.01) 09/23/2021   22:13:34  ( -78.20,   4.02)    0.86                71
 09/23/2021   23:05:30   (  78.20, 171.38) 09/23/2021   23:04:38  (  78.21, 171.28)    2.27                52
 09/23/2021   23:56:14   ( -78.22, -21.38) 09/23/2021   23:55:34  ( -78.21, -21.42)    1.08                40
 09/24/2021   00:47:00   (  78.24, 145.77) 09/24/2021   00:46:38  (  78.22, 145.84)    3.38                22
 09/24/2021   01:37:43   ( -78.22, -46.77) 09/24/2021   01:37:34  ( -78.22, -46.87)    2.39                 9
 09/24/2021   02:28:28   (  78.25, 120.38) 09/24/2021   02:28:37  (  78.23, 120.40)    2.37                 9
 09/24/2021   03:19:12   ( -78.26, -72.37) 09/24/2021   03:19:33  ( -78.23, -72.31)    3.59                21
 09/24/2021   04:09:57   (  78.25,  94.99) 09/24/2021   04:10:37  (  78.24,  94.95)    1.93                40
 09/24/2021   05:00:41   ( -78.26, -97.76) 09/24/2021   05:01:33  ( -78.24, -97.76)    2.73                52
 09/24/2021   05:51:26   (  78.25,  69.60) 09/24/2021   05:52:37  (  78.24,  69.51)    2.39                71