Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 9.  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  ( -78.38, -76.10)    2.24                63
 07/17/2021   04:19:34   (  78.39,  91.33) 07/17/2021   04:18:42  (  78.40,  91.27)    1.69                52
 07/17/2021   05:10:19   ( -78.40,-101.45) 07/17/2021   05:09:47  ( -78.39,-101.53)    2.18                32
 07/17/2021   06:01:03   (  78.39,  65.94) 07/17/2021   06:00:42  (  78.41,  65.84)    3.06                21
 07/17/2021   06:51:48   ( -78.40,-126.83) 07/17/2021   06:51:47  ( -78.40,-126.96)    2.88                 1
 07/17/2021   07:42:33   (  78.43,  40.33) 07/17/2021   07:42:42  (  78.42,  40.41)    2.21                 9
 07/17/2021   08:33:18   ( -78.45,-152.44) 07/17/2021   08:33:47  ( -78.41,-152.39)    3.65                29
 07/17/2021   09:24:02   (  78.43,  14.95) 07/17/2021   09:24:42  (  78.43,  14.98)    0.85                40
 07/17/2021   10:14:47   ( -78.45,-177.82) 07/17/2021   10:15:47  ( -78.42,-177.81)    2.52                60
 07/17/2021   11:05:31   (  78.44, -10.44) 07/17/2021   11:06:42  (  78.44, -10.45)    0.51                71