Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 15.  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   04:13:01   ( -78.53, -88.25) 05/23/2021   04:11:50  ( -78.55, -88.17)    2.75                71
 05/23/2021   05:03:47   (  78.55,  78.94) 05/23/2021   05:02:55  (  78.54,  79.00)    1.85                52
 05/23/2021   05:54:30   ( -78.53,-113.63) 05/23/2021   05:53:50  ( -78.56,-113.58)    3.46                40
 05/23/2021   06:45:16   (  78.55,  53.56) 05/23/2021   06:44:55  (  78.55,  53.59)    0.76                21
 05/23/2021   07:36:00   ( -78.57,-139.24) 05/23/2021   07:35:51  ( -78.54,-139.23)    3.66                 9
 05/23/2021   08:26:45   (  78.55,  28.17) 05/23/2021   08:26:55  (  78.56,  28.18)    1.15                10
 05/23/2021   09:17:29   ( -78.57,-164.63) 05/23/2021   09:17:51  ( -78.55,-164.65)    2.54                22
 05/23/2021   10:08:14   (  78.55,   2.79) 05/23/2021   10:08:55  (  78.57,   2.77)    2.36                41
 05/23/2021   10:58:58   ( -78.57, 169.99) 05/23/2021   10:59:51  ( -78.56, 169.94)    1.76                53
 05/23/2021   11:49:43   (  78.56, -22.59) 05/23/2021   11:50:55  (  78.59, -22.65)    3.65                72