Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 19.  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,  17.06) 07/30/2021   21:16:38  ( -78.34,  16.96)    2.80                66
 07/30/2021   22:08:28   (  78.35,-175.58) 07/30/2021   22:07:31  (  78.38,-175.54)    3.30                57
 07/30/2021   22:59:13   ( -78.36,  -8.32) 07/30/2021   22:58:38  ( -78.35,  -8.48)    3.50                35
 07/30/2021   23:49:57   (  78.35, 159.04) 07/30/2021   23:49:31  (  78.39, 159.03)    4.01                26
 07/31/2021   00:40:43   ( -78.40, -33.93) 07/31/2021   00:40:38  ( -78.36, -33.91)    4.14                 5
 07/31/2021   01:31:27   (  78.39, 133.43) 07/31/2021   01:31:32  (  78.36, 133.36)    3.77                 5
 07/31/2021   02:22:12   ( -78.40, -59.32) 07/31/2021   02:22:38  ( -78.37, -59.34)    3.31                26
 07/31/2021   03:12:56   (  78.39, 108.04) 07/31/2021   03:13:31  (  78.41, 108.16)    3.03                35
 07/31/2021   04:03:41   ( -78.40, -84.70) 07/31/2021   04:04:38  ( -78.38, -84.77)    2.93                57
 07/31/2021   04:54:25   (  78.40,  82.66) 07/31/2021   04:55:31  (  78.42,  82.73)    2.74                66