Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 26.  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)
 07/30/2021   21:17:44   ( -78.35,  17.10) 07/30/2021   21:16:38  ( -78.35,  17.01)    2.00                66
 07/30/2021   22:08:29   (  78.37,-175.73) 07/30/2021   22:07:32  (  78.35,-175.69)    2.68                57
 07/30/2021   22:59:13   ( -78.35,  -8.29) 07/30/2021   22:58:38  ( -78.36,  -8.42)    3.18                35
 07/30/2021   23:49:58   (  78.38, 158.88) 07/30/2021   23:49:32  (  78.36, 158.87)    1.71                26
 07/31/2021   00:40:43   ( -78.39, -33.89) 07/31/2021   00:40:38  ( -78.37, -33.86)    2.78                 5
 07/31/2021   01:31:27   (  78.38, 133.50) 07/31/2021   01:31:32  (  78.37, 133.44)    1.58                 5
 07/31/2021   02:22:12   ( -78.40, -59.28) 07/31/2021   02:22:38  ( -78.38, -59.29)    1.80                26
 07/31/2021   03:12:56   (  78.38, 108.12) 07/31/2021   03:13:32  (  78.38, 108.01)    2.41                36
 07/31/2021   04:03:41   ( -78.40, -84.66) 07/31/2021   04:04:38  ( -78.39, -84.72)    1.60                57
 07/31/2021   04:54:25   (  78.38,  82.73) 07/31/2021   04:55:32  (  78.39,  82.57)    3.59                67