Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 6 11.  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   15:00:09   (  78.31, -68.59) 06/19/2021   14:58:59  (  78.31, -70.41)   40.86                70
 06/19/2021   15:50:57   ( -78.47,  97.81) 06/19/2021   15:49:53  ( -78.46,  97.83)    0.66                64
 06/19/2021   16:41:42   (  78.47, -94.88) 06/19/2021   16:40:55  (  78.47, -94.89)    0.33                47
 06/19/2021   17:32:26   ( -78.47,  72.43) 06/19/2021   17:31:53  ( -78.47,  72.41)    0.72                33
 06/19/2021   18:23:11   (  78.47,-120.26) 06/19/2021   18:22:55  (  78.48,-120.32)    1.62                16
 06/19/2021   19:13:55   ( -78.47,  47.05) 06/19/2021   19:13:53  ( -78.49,  46.99)    2.08                 2
 06/19/2021   20:04:40   (  78.47,-145.65) 06/19/2021   20:04:55  (  78.49,-145.74)    2.96                15
 06/19/2021   20:55:25   ( -78.51,  21.43) 06/19/2021   20:55:53  ( -78.50,  21.57)    3.39                28
 06/19/2021   21:46:10   (  78.51,-171.26) 06/19/2021   21:46:55  (  78.50,-171.16)    2.41                45
 06/19/2021   22:36:54   ( -78.51,  -3.95) 06/19/2021   22:37:53  ( -78.51,  -3.85)    2.29                59
 06/19/2021   23:27:41   (  78.59, 162.90) 06/19/2021   23:28:54  (  78.55, 163.66)   17.38                73