Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 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)
 05/23/2021   04:13:02   ( -78.55, -88.37) 05/23/2021   04:11:51  ( -78.51, -88.39)    3.98                71
 05/23/2021   05:03:47   (  78.54,  79.00) 05/23/2021   05:02:55  (  78.54,  79.00)    0.36                52
 05/23/2021   05:54:31   ( -78.55,-113.75) 05/23/2021   05:53:51  ( -78.52,-113.81)    3.05                40
 05/23/2021   06:45:16   (  78.54,  53.62) 05/23/2021   06:44:55  (  78.55,  53.58)    1.20                21
 05/23/2021   07:36:00   ( -78.55,-139.13) 05/23/2021   07:35:51  ( -78.54,-139.22)    2.57                 9
 05/23/2021   08:26:45   (  78.54,  28.24) 05/23/2021   08:26:55  (  78.56,  28.17)    2.55                10
 05/23/2021   09:17:29   ( -78.55,-164.51) 05/23/2021   09:17:51  ( -78.55,-164.63)    2.78                22
 05/23/2021   10:08:15   (  78.58,   2.63) 05/23/2021   10:08:55  (  78.57,   2.76)    3.10                40
 05/23/2021   10:58:58   ( -78.55, 170.11) 05/23/2021   10:59:51  ( -78.56, 169.95)    3.54                53
 05/23/2021   11:49:44   (  78.58, -22.76) 05/23/2021   11:50:55  (  78.59, -22.65)    2.30                71