Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 11.  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   ( -78.38, -75.94) 07/17/2021   03:27:46  ( -78.41, -75.94)    2.97                63
 07/17/2021   04:19:34   (  78.40,  91.23) 07/17/2021   04:18:42  (  78.39,  91.20)    1.91                52
 07/17/2021   05:10:18   ( -78.38,-101.33) 07/17/2021   05:09:46  ( -78.42,-101.37)    4.03                32
 07/17/2021   06:01:03   (  78.41,  65.84) 07/17/2021   06:00:42  (  78.40,  65.77)    1.82                21
 07/17/2021   06:51:48   ( -78.42,-126.94) 07/17/2021   06:51:46  ( -78.43,-126.80)    3.15                 2
 07/17/2021   07:42:32   (  78.41,  40.46) 07/17/2021   07:42:42  (  78.41,  40.34)    2.58                10
 07/17/2021   08:33:17   ( -78.42,-152.32) 07/17/2021   08:33:46  ( -78.44,-152.23)    2.62                29
 07/17/2021   09:24:01   (  78.41,  15.07) 07/17/2021   09:24:42  (  78.42,  14.91)    3.69                41
 07/17/2021   10:14:46   ( -78.43,-177.70) 07/17/2021   10:15:46  ( -78.45,-177.65)    2.72                60
 07/17/2021   11:05:31   (  78.45, -10.54) 07/17/2021   11:06:42  (  78.43, -10.52)    2.62                71