Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 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)
 12/18/2021   03:24:16   ( -77.62, -69.71) 12/18/2021   03:23:11  ( -77.65, -73.33)   86.04                65
 12/18/2021   04:15:11   (  77.99,  95.72) 12/18/2021   04:13:57  (  77.98,  95.79)    1.97                74
 12/18/2021   05:05:57   ( -78.01, -97.04) 12/18/2021   05:05:02  ( -78.00, -96.88)    3.71                55
 12/18/2021   05:56:42   (  77.97,  70.45) 12/18/2021   05:55:57  (  77.99,  70.33)    3.27                45
 12/18/2021   06:47:28   ( -77.99,-122.31) 12/18/2021   06:47:02  ( -78.01,-122.34)    2.39                26
 12/18/2021   07:38:14   (  77.99,  44.96) 12/18/2021   07:37:57  (  78.00,  44.87)    2.22                17
 12/18/2021   08:29:00   ( -78.01,-147.80) 12/18/2021   08:29:02  ( -78.01,-147.81)    0.76                 2
 12/18/2021   09:19:46   (  78.01,  19.47) 12/18/2021   09:19:57  (  78.00,  19.40)    2.13                11
 12/18/2021   10:10:32   ( -78.03,-173.28) 12/18/2021   10:11:02  ( -78.02,-173.27)    0.87                30
 12/18/2021   11:01:18   (  78.03,  -6.01) 12/18/2021   11:01:57  (  78.01,  -6.06)    3.09                39
 12/18/2021   11:52:04   ( -78.05, 161.23) 12/18/2021   11:53:02  ( -78.02, 161.27)    2.50                58
 12/18/2021   12:42:49   (  78.01, -31.29) 12/18/2021   12:43:56  (  78.05, -31.30)    4.23                67