Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 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)
 05/23/2021   04:13:02   ( -78.52, -88.18) 05/23/2021   04:11:51  ( -78.52, -88.31)    3.13                71
 05/23/2021   05:03:48   (  78.54,  78.98) 05/23/2021   05:02:55  (  78.55,  79.10)    2.92                53
 05/23/2021   05:54:32   ( -78.56,-113.79) 05/23/2021   05:53:51  ( -78.54,-113.73)    2.44                41
 05/23/2021   06:45:17   (  78.54,  53.60) 05/23/2021   06:44:55  (  78.56,  53.69)    3.06                22
 05/23/2021   07:36:01   ( -78.56,-139.17) 05/23/2021   07:35:51  ( -78.55,-139.14)    1.04                10
 05/23/2021   08:26:46   (  78.54,  28.22) 05/23/2021   08:26:55  (  78.58,  28.28)    3.76                 9
 05/23/2021   09:17:30   ( -78.56,-164.55) 05/23/2021   09:17:51  ( -78.56,-164.55)    0.39                21
 05/23/2021   10:08:16   (  78.58,   2.61) 05/23/2021   10:08:56  (  78.55,   2.62)    3.41                40
 05/23/2021   10:58:59   ( -78.56, 170.07) 05/23/2021   10:59:51  ( -78.57, 170.04)    1.77                52
 05/23/2021   11:49:45   (  78.59, -22.78) 05/23/2021   11:50:56  (  78.57, -22.79)    2.18                71