Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 20.  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   ( -78.54, -88.32) 05/23/2021   04:11:50  ( -78.54, -88.20)    2.66                72
 05/23/2021   05:03:47   (  78.52,  79.08) 05/23/2021   05:02:55  (  78.53,  78.99)    2.41                52
 05/23/2021   05:54:31   ( -78.54,-113.70) 05/23/2021   05:53:50  ( -78.55,-113.61)    2.41                41
 05/23/2021   06:45:17   (  78.56,  53.47) 05/23/2021   06:44:55  (  78.55,  53.58)    2.94                22
 05/23/2021   07:36:00   ( -78.54,-139.08) 05/23/2021   07:35:50  ( -78.57,-139.03)    2.90                10
 05/23/2021   08:26:46   (  78.57,  28.09) 05/23/2021   08:26:55  (  78.56,  28.16)    1.75                 9
 05/23/2021   09:17:29   ( -78.54,-164.46) 05/23/2021   09:17:50  ( -78.58,-164.44)    3.85                21
 05/23/2021   10:08:15   (  78.57,   2.71) 05/23/2021   10:08:55  (  78.57,   2.75)    1.14                40
 05/23/2021   10:58:59   ( -78.58, 169.93) 05/23/2021   10:59:51  ( -78.56, 169.91)    3.10                52
 05/23/2021   11:49:44   (  78.57, -22.67) 05/23/2021   11:50:55  (  78.59, -22.66)    1.83                71