Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 15.  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)
 07/17/2021   03:28:50   ( -78.40, -76.06) 07/17/2021   03:27:47  ( -78.39, -76.06)    1.13                63
 07/17/2021   04:19:34   (  78.38,  91.35) 07/17/2021   04:18:42  (  78.41,  91.34)    2.83                52
 07/17/2021   05:10:19   ( -78.40,-101.44) 07/17/2021   05:09:47  ( -78.40,-101.48)    0.94                32
 07/17/2021   06:01:03   (  78.39,  65.96) 07/17/2021   06:00:42  (  78.42,  65.91)    3.89                21
 07/17/2021   06:51:48   ( -78.40,-126.83) 07/17/2021   06:51:47  ( -78.41,-126.91)    2.05                 1
 07/17/2021   07:42:33   (  78.43,  40.35) 07/17/2021   07:42:42  (  78.43,  40.48)    2.89                 9
 07/17/2021   08:33:17   ( -78.41,-152.21) 07/17/2021   08:33:47  ( -78.42,-152.34)    3.34                30
 07/17/2021   09:24:02   (  78.43,  14.97) 07/17/2021   09:24:42  (  78.44,  15.05)    2.21                40
 07/17/2021   10:14:46   ( -78.45,-177.82) 07/17/2021   10:15:46  ( -78.43,-177.77)    2.00                60
 07/17/2021   11:05:30   (  78.43, -10.42) 07/17/2021   11:06:41  (  78.45, -10.38)    2.25                71