Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 6 10.  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   (  78.30, -68.54) 06/19/2021   14:58:59  (  78.32, -70.38)   41.41                70
 06/19/2021   15:50:57   ( -78.46,  97.87) 06/19/2021   15:49:53  ( -78.47,  97.86)    1.23                64
 06/19/2021   16:41:42   (  78.46, -94.83) 06/19/2021   16:40:55  (  78.47, -94.86)    1.77                47
 06/19/2021   17:32:26   ( -78.46,  72.49) 06/19/2021   17:31:53  ( -78.48,  72.45)    2.49                33
 06/19/2021   18:23:11   (  78.46,-120.21) 06/19/2021   18:22:55  (  78.48,-120.29)    3.10                16
 06/19/2021   19:13:56   ( -78.50,  46.88) 06/19/2021   19:13:53  ( -78.49,  47.03)    3.40                 3
 06/19/2021   20:04:41   (  78.50,-145.82) 06/19/2021   20:04:55  (  78.50,-145.71)    2.54                14
 06/19/2021   20:55:25   ( -78.50,  21.49) 06/19/2021   20:55:53  ( -78.50,  21.61)    2.48                28
 06/19/2021   21:46:10   (  78.50,-171.20) 06/19/2021   21:46:55  (  78.51,-171.13)    1.61                45
 06/19/2021   22:36:54   ( -78.50,  -3.89) 06/19/2021   22:37:53  ( -78.52,  -3.81)    2.12                59
 06/19/2021   23:27:41   (  78.58, 162.95) 06/19/2021   23:28:54  (  78.55, 163.68)   16.50                73