Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 8.  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, -76.10) 07/17/2021   03:27:47  ( -78.39, -76.08)    2.42                63
 07/17/2021   04:19:34   (  78.39,  91.28) 07/17/2021   04:18:42  (  78.40,  91.29)    0.64                52
 07/17/2021   05:10:19   ( -78.41,-101.49) 07/17/2021   05:09:47  ( -78.40,-101.51)    1.50                32
 07/17/2021   06:01:03   (  78.40,  65.90) 07/17/2021   06:00:42  (  78.41,  65.86)    1.73                21
 07/17/2021   06:51:48   ( -78.41,-126.87) 07/17/2021   06:51:47  ( -78.41,-126.94)    1.52                 1
 07/17/2021   07:42:32   (  78.40,  40.51) 07/17/2021   07:42:42  (  78.42,  40.43)    3.03                10
 07/17/2021   08:33:17   ( -78.41,-152.25) 07/17/2021   08:33:47  ( -78.42,-152.36)    2.45                30
 07/17/2021   09:24:02   (  78.44,  14.90) 07/17/2021   09:24:42  (  78.43,  15.00)    2.41                40
 07/17/2021   10:14:47   ( -78.45,-177.86) 07/17/2021   10:15:47  ( -78.43,-177.79)    3.31                60
 07/17/2021   11:05:31   (  78.44, -10.48) 07/17/2021   11:06:42  (  78.44, -10.43)    1.19                71