Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 6 18.  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   (  78.33, -68.71) 06/19/2021   14:58:59  (  78.33, -70.32)   36.24                71
 06/19/2021   15:50:57   ( -78.45,  97.88) 06/19/2021   15:49:53  ( -78.47,  97.89)    1.97                64
 06/19/2021   16:41:42   (  78.45, -94.77) 06/19/2021   16:40:55  (  78.48, -94.80)    3.84                47
 06/19/2021   17:32:26   ( -78.46,  72.50) 06/19/2021   17:31:53  ( -78.48,  72.47)    3.11                33
 06/19/2021   18:23:12   (  78.49,-120.38) 06/19/2021   18:22:55  (  78.49,-120.22)    3.45                17
 06/19/2021   19:13:56   ( -78.50,  46.89) 06/19/2021   19:13:53  ( -78.50,  47.05)    3.62                 3
 06/19/2021   20:04:41   (  78.49,-145.76) 06/19/2021   20:04:55  (  78.50,-145.65)    2.96                14
 06/19/2021   20:55:25   ( -78.50,  21.51) 06/19/2021   20:55:53  ( -78.51,  21.64)    2.97                28
 06/19/2021   21:46:10   (  78.49,-171.14) 06/19/2021   21:46:55  (  78.52,-171.07)    3.03                45
 06/19/2021   22:36:54   ( -78.50,  -3.87) 06/19/2021   22:37:53  ( -78.52,  -3.78)    2.87                59
 06/19/2021   23:27:41   (  78.57, 163.01) 06/19/2021   23:28:54  (  78.56, 163.75)   16.29                73