Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 10 5.  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)
 10/07/2021   16:03:27   ( -77.86,  98.75) 10/07/2021   16:02:21  ( -77.87,  95.40)   78.37                66
 10/07/2021   16:54:20   (  78.16, -95.53) 10/07/2021   16:53:18  (  78.16, -95.65)    2.63                62
 10/07/2021   17:45:04   ( -78.19,  71.67) 10/07/2021   17:44:13  ( -78.18,  71.70)    1.27                51
 10/07/2021   18:35:49   (  78.17,-120.92) 10/07/2021   18:35:18  (  78.17,-121.10)    3.94                31
 10/07/2021   19:26:33   ( -78.19,  46.28) 10/07/2021   19:26:13  ( -78.18,  46.26)    0.73                20
 10/07/2021   20:17:19   (  78.21,-146.53) 10/07/2021   20:17:18  (  78.18,-146.54)    3.63                 1
 10/07/2021   21:08:02   ( -78.19,  20.89) 10/07/2021   21:08:13  ( -78.19,  20.81)    1.85                11
 10/07/2021   21:58:48   (  78.22,-171.92) 10/07/2021   21:59:18  (  78.19,-171.99)    3.48                30
 10/07/2021   22:49:31   ( -78.20,  -4.50) 10/07/2021   22:50:13  ( -78.20,  -4.64)    3.21                42
 10/07/2021   23:40:16   (  78.22, 162.69) 10/07/2021   23:41:16  (  78.23, 162.79)    2.74                60
 10/08/2021   00:31:00   ( -78.24, -30.10) 10/08/2021   00:32:12  ( -78.21, -30.08)    3.27                72