Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 6 7.  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)
 06/19/2021   15:00:10   (  78.32, -68.67) 06/19/2021   14:58:59  (  78.34, -70.23)   35.22                71
 06/19/2021   15:50:58   ( -78.48,  97.76) 06/19/2021   15:49:54  ( -78.46,  97.79)    2.37                64
 06/19/2021   16:41:43   (  78.48, -94.96) 06/19/2021   16:40:56  (  78.46, -94.95)    2.43                47
 06/19/2021   17:32:27   ( -78.48,  72.37) 06/19/2021   17:31:54  ( -78.47,  72.37)    1.17                33
 06/19/2021   18:23:12   (  78.48,-120.34) 06/19/2021   18:22:56  (  78.47,-120.38)    1.64                16
 06/19/2021   19:13:56   ( -78.48,  46.99) 06/19/2021   19:13:54  ( -78.48,  46.95)    0.90                 2
 06/19/2021   20:04:41   (  78.49,-145.72) 06/19/2021   20:04:56  (  78.48,-145.80)    1.74                15
 06/19/2021   20:55:25   ( -78.48,  21.61) 06/19/2021   20:55:54  ( -78.49,  21.53)    1.97                29
 06/19/2021   21:46:09   (  78.49,-171.11) 06/19/2021   21:46:55  (  78.49,-171.22)    2.62                46
 06/19/2021   22:36:53   ( -78.49,  -3.78) 06/19/2021   22:37:53  ( -78.50,  -3.89)    3.25                60
 06/19/2021   23:27:41   (  78.60, 162.82) 06/19/2021   23:28:53  (  78.57, 163.84)   22.68                72