Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 10 1.  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,  98.77) 10/07/2021   16:02:21  ( -77.86,  95.39)   79.22                66
 10/07/2021   16:54:20   (  78.16, -95.53) 10/07/2021   16:53:18  (  78.16, -95.68)    3.41                62
 10/07/2021   17:45:04   ( -78.18,  71.69) 10/07/2021   17:44:13  ( -78.17,  71.69)    0.90                51
 10/07/2021   18:35:49   (  78.17,-120.92) 10/07/2021   18:35:17  (  78.20,-120.90)    3.84                32
 10/07/2021   19:26:33   ( -78.18,  46.31) 10/07/2021   19:26:13  ( -78.18,  46.24)    1.45                20
 10/07/2021   20:17:19   (  78.21,-146.53) 10/07/2021   20:17:17  (  78.21,-146.35)    4.18                 2
 10/07/2021   21:08:02   ( -78.19,  20.92) 10/07/2021   21:08:13  ( -78.19,  20.80)    2.73                11
 10/07/2021   21:58:48   (  78.21,-171.92) 10/07/2021   21:59:17  (  78.22,-171.79)    2.91                29
 10/07/2021   22:49:32   ( -78.23,  -4.69) 10/07/2021   22:50:13  ( -78.20,  -4.65)    3.73                41
 10/07/2021   23:40:17   (  78.22, 162.69) 10/07/2021   23:41:17  (  78.23, 162.76)    1.85                60
 10/08/2021   00:31:01   ( -78.23, -30.08) 10/08/2021   00:32:13  ( -78.21, -30.10)    3.08                72