Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 18.  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   ( -78.20,   4.10) 09/23/2021   22:13:33  ( -78.22,   4.12)    2.82                71
 09/23/2021   23:05:30   (  78.22, 171.27) 09/23/2021   23:04:37  (  78.23, 171.40)    3.16                53
 09/23/2021   23:56:13   ( -78.20, -21.29) 09/23/2021   23:55:33  ( -78.23, -21.33)    3.51                40
 09/24/2021   00:46:59   (  78.23, 145.88) 09/24/2021   00:46:37  (  78.24, 145.96)    2.23                22
 09/24/2021   01:37:43   ( -78.24, -46.89) 09/24/2021   01:37:33  ( -78.24, -46.77)    2.75                10
 09/24/2021   02:28:28   (  78.23, 120.49) 09/24/2021   02:28:37  (  78.25, 120.51)    1.97                 9
 09/24/2021   03:19:12   ( -78.24, -72.28) 09/24/2021   03:19:33  ( -78.25, -72.22)    1.44                21
 09/24/2021   04:09:57   (  78.23,  95.10) 09/24/2021   04:10:37  (  78.25,  95.07)    2.58                40
 09/24/2021   05:00:41   ( -78.25, -97.67) 09/24/2021   05:01:33  ( -78.25, -97.66)    0.79                52
 09/24/2021   05:51:27   (  78.27,  69.49) 09/24/2021   05:52:37  (  78.26,  69.63)    3.32                70