Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 7.  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   03:28:49   ( -78.40, -76.04) 07/17/2021   03:27:46  ( -78.41, -75.94)    2.52                63
 07/17/2021   04:19:33   (  78.38,  91.34) 07/17/2021   04:18:42  (  78.39,  91.19)    3.34                51
 07/17/2021   05:10:18   ( -78.40,-101.42) 07/17/2021   05:09:46  ( -78.42,-101.37)    2.51                32
 07/17/2021   06:01:03   (  78.43,  65.73) 07/17/2021   06:00:42  (  78.40,  65.76)    3.37                21
 07/17/2021   06:51:47   ( -78.40,-126.81) 07/17/2021   06:51:46  ( -78.43,-126.79)    3.13                 1
 07/17/2021   07:42:32   (  78.43,  40.34) 07/17/2021   07:42:42  (  78.41,  40.33)    2.44                10
 07/17/2021   08:33:16   ( -78.40,-152.19) 07/17/2021   08:33:46  ( -78.44,-152.22)    4.09                30
 07/17/2021   09:24:01   (  78.43,  14.96) 07/17/2021   09:24:42  (  78.42,  14.90)    2.00                41
 07/17/2021   10:14:46   ( -78.44,-177.80) 07/17/2021   10:15:46  ( -78.45,-177.65)    3.50                60
 07/17/2021   11:05:30   (  78.43, -10.43) 07/17/2021   11:06:42  (  78.43, -10.53)    2.37                72