Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 6 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)
 06/19/2021   15:00:10   (  78.32, -68.62) 06/19/2021   14:59:00  (  78.30, -70.46)   41.55                70
 06/19/2021   15:50:58   ( -78.47,  97.77) 06/19/2021   15:49:54  ( -78.45,  97.75)    2.57                64
 06/19/2021   16:41:43   (  78.47, -94.90) 06/19/2021   16:40:56  (  78.46, -94.95)    1.66                47
 06/19/2021   17:32:27   ( -78.48,  72.38) 06/19/2021   17:31:54  ( -78.46,  72.33)    1.82                33
 06/19/2021   18:23:12   (  78.47,-120.29) 06/19/2021   18:22:56  (  78.47,-120.37)    1.92                16
 06/19/2021   19:13:56   ( -78.48,  47.00) 06/19/2021   19:13:54  ( -78.48,  46.92)    1.94                 2
 06/19/2021   20:04:41   (  78.48,-145.67) 06/19/2021   20:04:56  (  78.48,-145.80)    2.87                15
 06/19/2021   20:55:25   ( -78.48,  21.62) 06/19/2021   20:55:54  ( -78.49,  21.50)    2.81                29
 06/19/2021   21:46:11   (  78.52,-171.28) 06/19/2021   21:46:56  (  78.49,-171.22)    2.90                45
 06/19/2021   22:36:55   ( -78.52,  -3.99) 06/19/2021   22:37:54  ( -78.50,  -3.92)    2.87                59
 06/19/2021   23:27:42   (  78.59, 162.87) 06/19/2021   23:28:55  (  78.54, 163.60)   17.13                73