Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 29.  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   ( -78.33,  17.19) 07/30/2021   21:16:38  ( -78.37,  17.14)    3.99                66
 07/30/2021   22:08:29   (  78.36,-175.63) 07/30/2021   22:07:32  (  78.37,-175.55)    2.69                57
 07/30/2021   22:59:14   ( -78.38,  -8.42) 07/30/2021   22:58:38  ( -78.38,  -8.29)    3.03                36
 07/30/2021   23:49:58   (  78.36, 158.98) 07/30/2021   23:49:32  (  78.38, 159.02)    2.84                26
 07/31/2021   00:40:43   ( -78.38, -33.81) 07/31/2021   00:40:38  ( -78.39, -33.72)    2.32                 5
 07/31/2021   01:31:27   (  78.36, 133.60) 07/31/2021   01:31:32  (  78.39, 133.59)    3.54                 5
 07/31/2021   02:22:12   ( -78.38, -59.19) 07/31/2021   02:22:38  ( -78.40, -59.15)    2.30                26
 07/31/2021   03:12:57   (  78.40, 107.99) 07/31/2021   03:13:32  (  78.41, 108.16)    3.78                35
 07/31/2021   04:03:41   ( -78.38, -84.58) 07/31/2021   04:04:38  ( -78.41, -84.59)    2.98                57
 07/31/2021   04:54:25   (  78.41,  82.60) 07/31/2021   04:55:31  (  78.42,  82.72)    2.87                66