Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 12.  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   ( -78.41, -76.12) 07/17/2021   03:27:47  ( -78.38, -76.12)    3.45                63
 07/17/2021   04:19:34   (  78.39,  91.28) 07/17/2021   04:18:42  (  78.40,  91.26)    0.41                52
 07/17/2021   05:10:19   ( -78.41,-101.51) 07/17/2021   05:09:47  ( -78.39,-101.55)    2.69                32
 07/17/2021   06:01:03   (  78.40,  65.90) 07/17/2021   06:00:42  (  78.41,  65.83)    1.75                21
 07/17/2021   06:51:48   ( -78.41,-126.89) 07/17/2021   06:51:47  ( -78.40,-126.98)    2.51                 1
 07/17/2021   07:42:32   (  78.40,  40.51) 07/17/2021   07:42:42  (  78.42,  40.40)    3.10                10
 07/17/2021   08:33:17   ( -78.42,-152.27) 07/17/2021   08:33:47  ( -78.41,-152.41)    3.00                30
 07/17/2021   09:24:02   (  78.44,  14.90) 07/17/2021   09:24:42  (  78.43,  14.97)    2.18                40
 07/17/2021   10:14:46   ( -78.42,-177.66) 07/17/2021   10:15:47  ( -78.42,-177.83)    3.92                61
 07/17/2021   11:05:31   (  78.44, -10.48) 07/17/2021   11:06:42  (  78.44, -10.46)    0.84                71