Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 21.  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,   4.00) 09/23/2021   22:13:33  ( -78.21,   4.05)    1.16                71
 09/23/2021   23:05:29   (  78.20, 171.40) 09/23/2021   23:04:37  (  78.22, 171.34)    2.79                52
 09/23/2021   23:56:13   ( -78.22, -21.39) 09/23/2021   23:55:33  ( -78.22, -21.40)    0.27                40
 09/24/2021   00:46:59   (  78.24, 145.79) 09/24/2021   00:46:37  (  78.23, 145.90)    2.73                22
 09/24/2021   01:37:42   ( -78.22, -46.77) 09/24/2021   01:37:33  ( -78.23, -46.84)    1.69                 9
 09/24/2021   02:28:28   (  78.24, 120.41) 09/24/2021   02:28:37  (  78.24, 120.46)    1.34                 9
 09/24/2021   03:19:11   ( -78.22, -72.16) 09/24/2021   03:19:33  ( -78.24, -72.29)    3.10                22
 09/24/2021   04:09:57   (  78.25,  95.02) 09/24/2021   04:10:37  (  78.25,  95.02)    0.08                40
 09/24/2021   05:00:41   ( -78.27, -97.77) 09/24/2021   05:01:33  ( -78.24, -97.73)    2.56                52
 09/24/2021   05:51:26   (  78.25,  69.63) 09/24/2021   05:52:37  (  78.26,  69.57)    1.42                71