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   03:24:17   ( -77.63, -69.75) 12/18/2021   03:23:12  ( -77.64, -73.36)   86.08                65
 12/18/2021   04:15:12   (  78.00,  95.69) 12/18/2021   04:13:58  (  77.98,  95.76)    2.92                74
 12/18/2021   05:05:56   ( -77.97, -96.86) 12/18/2021   05:05:02  ( -77.99, -96.91)    2.73                54
 12/18/2021   05:56:42   (  77.98,  70.42) 12/18/2021   05:55:57  (  77.98,  70.29)    2.88                45
 12/18/2021   06:47:28   ( -77.99,-122.34) 12/18/2021   06:47:02  ( -78.00,-122.38)    1.16                26
 12/18/2021   07:38:14   (  78.00,  44.93) 12/18/2021   07:37:57  (  77.99,  44.83)    2.57                17
 12/18/2021   08:29:00   ( -78.01,-147.83) 12/18/2021   08:29:02  ( -78.01,-147.84)    0.78                 2
 12/18/2021   09:19:46   (  78.02,  19.44) 12/18/2021   09:19:57  (  78.00,  19.37)    3.21                11
 12/18/2021   10:10:32   ( -78.03,-173.31) 12/18/2021   10:11:02  ( -78.01,-173.31)    2.28                30
 12/18/2021   11:01:18   (  78.04,  -6.04) 12/18/2021   11:01:56  (  78.04,  -5.87)    3.90                38
 12/18/2021   11:52:04   ( -78.05, 161.20) 12/18/2021   11:53:02  ( -78.02, 161.23)    3.89                58
 12/18/2021   12:42:49   (  78.02, -31.32) 12/18/2021   12:43:56  (  78.05, -31.34)    2.89                67