Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 17.  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,   4.09)    2.09                71
 09/23/2021   23:05:30   (  78.22, 171.25) 09/23/2021   23:04:37  (  78.22, 171.37)    2.53                53
 09/23/2021   23:56:13   ( -78.20, -21.29) 09/23/2021   23:55:33  ( -78.22, -21.36)    3.07                40
 09/24/2021   00:46:59   (  78.23, 145.87) 09/24/2021   00:46:37  (  78.23, 145.92)    1.32                22
 09/24/2021   01:37:43   ( -78.24, -46.90) 09/24/2021   01:37:33  ( -78.23, -46.80)    2.40                10
 09/24/2021   02:28:28   (  78.23, 120.48) 09/24/2021   02:28:37  (  78.24, 120.48)    1.02                 9
 09/24/2021   03:19:12   ( -78.25, -72.29) 09/24/2021   03:19:33  ( -78.24, -72.25)    0.98                21
 09/24/2021   04:09:57   (  78.23,  95.09) 09/24/2021   04:10:37  (  78.25,  95.04)    2.06                40
 09/24/2021   05:00:41   ( -78.25, -97.67) 09/24/2021   05:01:33  ( -78.25, -97.69)    0.46                52
 09/24/2021   05:51:27   (  78.28,  69.48) 09/24/2021   05:52:37  (  78.26,  69.59)    3.26                70