Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 12.  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   03:24:17   ( -77.65, -69.86) 12/18/2021   03:23:11  ( -77.65, -73.30)   81.83                66
 12/18/2021   04:15:11   (  77.98,  95.79) 12/18/2021   04:13:57  (  77.99,  95.83)    1.42                74
 12/18/2021   05:05:57   ( -77.99, -96.98) 12/18/2021   05:05:02  ( -78.01, -96.85)    3.22                55
 12/18/2021   05:56:43   (  78.00,  70.31) 12/18/2021   05:55:57  (  78.00,  70.37)    1.44                46
 12/18/2021   06:47:29   ( -78.01,-122.46) 12/18/2021   06:47:02  ( -78.01,-122.31)    3.42                27
 12/18/2021   07:38:15   (  78.02,  44.82) 12/18/2021   07:37:57  (  78.00,  44.90)    2.74                18
 12/18/2021   08:29:00   ( -77.99,-147.73) 12/18/2021   08:29:02  ( -78.02,-147.78)    2.83                 2
 12/18/2021   09:19:46   (  78.00,  19.55) 12/18/2021   09:19:57  (  78.01,  19.44)    2.60                11
 12/18/2021   10:10:32   ( -78.01,-173.22) 12/18/2021   10:11:02  ( -78.02,-173.24)    1.21                30
 12/18/2021   11:01:18   (  78.02,  -5.94) 12/18/2021   11:01:57  (  78.01,  -6.02)    1.94                39
 12/18/2021   11:52:04   ( -78.03, 161.30) 12/18/2021   11:53:02  ( -78.03, 161.30)    0.44                58
 12/18/2021   12:42:50   (  78.04, -31.43) 12/18/2021   12:43:57  (  78.02, -31.48)    2.46                67