Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 12.  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   ( -78.51, -88.16) 05/23/2021   04:11:51  ( -78.54, -88.24)    3.00                71
 05/23/2021   05:03:48   (  78.54,  78.98) 05/23/2021   05:02:56  (  78.52,  78.91)    2.48                52
 05/23/2021   05:54:32   ( -78.55,-113.77) 05/23/2021   05:53:51  ( -78.55,-113.65)    2.66                41
 05/23/2021   06:45:17   (  78.54,  53.60) 05/23/2021   06:44:56  (  78.54,  53.50)    2.29                21
 05/23/2021   07:36:01   ( -78.55,-139.15) 05/23/2021   07:35:51  ( -78.56,-139.07)    1.97                10
 05/23/2021   08:26:46   (  78.55,  28.22) 05/23/2021   08:26:56  (  78.55,  28.09)    2.86                10
 05/23/2021   09:17:30   ( -78.56,-164.53) 05/23/2021   09:17:51  ( -78.57,-164.48)    2.14                21
 05/23/2021   10:08:16   (  78.58,   2.60) 05/23/2021   10:08:56  (  78.56,   2.68)    3.06                40
 05/23/2021   10:58:59   ( -78.56, 170.09) 05/23/2021   10:59:51  ( -78.58, 170.11)    3.01                52
 05/23/2021   11:49:45   (  78.59, -22.78) 05/23/2021   11:50:56  (  78.57, -22.73)    1.68                71