Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 21.  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   ( -78.53, -88.29) 05/23/2021   04:11:51  ( -78.51, -88.39)    3.28                71
 05/23/2021   05:03:47   (  78.52,  79.12) 05/23/2021   05:02:55  (  78.54,  79.04)    3.16                52
 05/23/2021   05:54:31   ( -78.54,-113.67) 05/23/2021   05:53:51  ( -78.53,-113.81)    3.23                40
 05/23/2021   06:45:17   (  78.56,  53.50) 05/23/2021   06:44:55  (  78.55,  53.62)    2.68                22
 05/23/2021   07:36:00   ( -78.54,-139.05) 05/23/2021   07:35:51  ( -78.54,-139.22)    3.74                 9
 05/23/2021   08:26:46   (  78.56,  28.12) 05/23/2021   08:26:55  (  78.57,  28.21)    2.11                 9
 05/23/2021   09:17:30   ( -78.58,-164.66) 05/23/2021   09:17:51  ( -78.55,-164.63)    3.06                21
 05/23/2021   10:08:15   (  78.56,   2.74) 05/23/2021   10:08:55  (  78.58,   2.80)    2.35                40
 05/23/2021   10:58:59   ( -78.58, 169.96) 05/23/2021   10:59:51  ( -78.56, 169.95)    1.82                52
 05/23/2021   11:49:44   (  78.56, -22.64) 05/23/2021   11:50:55  (  78.59, -22.61)    3.21                71