Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 18.  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   04:15:12   (  77.99,  95.72) 12/18/2021   04:13:58  (  77.98,  95.76)    1.80                74
 12/18/2021   05:05:56   ( -77.97, -96.87) 12/18/2021   05:05:02  ( -77.99, -96.94)    2.51                54
 12/18/2021   05:56:43   (  78.01,  70.24) 12/18/2021   05:55:57  (  77.99,  70.30)    3.42                46
 12/18/2021   06:47:28   ( -77.99,-122.35) 12/18/2021   06:47:02  ( -78.00,-122.40)    1.19                26
 12/18/2021   07:38:14   (  77.99,  44.96) 12/18/2021   07:37:57  (  77.99,  44.84)    2.88                17
 12/18/2021   08:29:00   ( -78.01,-147.84) 12/18/2021   08:29:02  ( -78.00,-147.87)    1.35                 2
 12/18/2021   09:19:46   (  78.01,  19.48) 12/18/2021   09:19:57  (  78.00,  19.37)    2.89                11
 12/18/2021   10:10:32   ( -78.03,-173.32) 12/18/2021   10:11:02  ( -78.01,-173.33)    2.73                30
 12/18/2021   11:01:18   (  78.03,  -6.01) 12/18/2021   11:01:56  (  78.04,  -5.87)    3.43                38
 12/18/2021   11:52:04   ( -78.05, 161.19) 12/18/2021   11:53:02  ( -78.02, 161.21)    4.29                58
 12/18/2021   12:42:50   (  78.05, -31.50) 12/18/2021   12:43:56  (  78.05, -31.33)    3.90                66