Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 16.  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,   4.06) 09/23/2021   22:13:33  ( -78.21,   4.08)    1.29                71
 09/23/2021   23:05:30   (  78.23, 171.22) 09/23/2021   23:04:37  (  78.22, 171.35)    3.23                53
 09/23/2021   23:56:13   ( -78.21, -21.32) 09/23/2021   23:55:33  ( -78.22, -21.37)    2.11                40
 09/24/2021   00:46:59   (  78.23, 145.83) 09/24/2021   00:46:37  (  78.23, 145.91)    1.84                22
 09/24/2021   01:37:43   ( -78.25, -46.93) 09/24/2021   01:37:33  ( -78.23, -46.81)    3.27                10
 09/24/2021   02:28:28   (  78.24, 120.44) 09/24/2021   02:28:37  (  78.24, 120.47)    0.53                 9
 09/24/2021   03:19:12   ( -78.25, -72.32) 09/24/2021   03:19:33  ( -78.24, -72.26)    1.89                21
 09/24/2021   04:09:57   (  78.24,  95.05) 09/24/2021   04:10:37  (  78.25,  95.02)    1.02                40
 09/24/2021   05:00:41   ( -78.25, -97.71) 09/24/2021   05:01:33  ( -78.25, -97.70)    0.71                52
 09/24/2021   05:51:26   (  78.24,  69.67) 09/24/2021   05:52:37  (  78.26,  69.58)    2.38                71