Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 23.  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   22:14:44   ( -78.21,   4.01) 09/23/2021   22:13:33  ( -78.21,   4.06)    1.08                71
 09/23/2021   23:05:29   (  78.19, 171.42) 09/23/2021   23:04:37  (  78.22, 171.36)    3.50                52
 09/23/2021   23:56:13   ( -78.21, -21.38) 09/23/2021   23:55:33  ( -78.22, -21.38)    0.65                40
 09/24/2021   00:46:59   (  78.24, 145.81) 09/24/2021   00:46:37  (  78.23, 145.92)    2.45                22
 09/24/2021   01:37:42   ( -78.22, -46.76) 09/24/2021   01:37:33  ( -78.23, -46.83)    1.93                 9
 09/24/2021   02:28:28   (  78.24, 120.43) 09/24/2021   02:28:37  (  78.24, 120.48)    1.16                 9
 09/24/2021   03:19:11   ( -78.22, -72.15) 09/24/2021   03:19:33  ( -78.24, -72.28)    3.33                22
 09/24/2021   04:09:57   (  78.24,  95.04) 09/24/2021   04:10:37  (  78.25,  95.03)    0.73                40
 09/24/2021   05:00:41   ( -78.26, -97.76) 09/24/2021   05:01:33  ( -78.25, -97.72)    2.14                52
 09/24/2021   05:51:26   (  78.25,  69.65) 09/24/2021   05:52:37  (  78.26,  69.59)    1.88                71