Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 17.  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, -69.84) 12/18/2021   03:23:11  ( -77.66, -73.27)   81.63                66
 12/18/2021   04:15:11   (  77.97,  95.84) 12/18/2021   04:13:57  (  78.00,  95.88)    3.19                74
 12/18/2021   05:05:57   ( -77.99, -96.96) 12/18/2021   05:05:03  ( -77.97, -97.04)    2.70                54
 12/18/2021   05:56:43   (  77.99,  70.35) 12/18/2021   05:55:57  (  78.01,  70.41)    2.09                46
 12/18/2021   06:47:29   ( -78.01,-122.44) 12/18/2021   06:47:02  ( -78.02,-122.29)    3.70                27
 12/18/2021   07:38:15   (  78.01,  44.86) 12/18/2021   07:37:57  (  78.01,  44.95)    2.01                18
 12/18/2021   08:29:00   ( -77.99,-147.72) 12/18/2021   08:29:02  ( -78.02,-147.75)    3.69                 2
 12/18/2021   09:19:47   (  78.03,  19.38) 12/18/2021   09:19:57  (  78.02,  19.49)    3.01                10
 12/18/2021   10:10:32   ( -78.01,-173.20) 12/18/2021   10:11:02  ( -78.03,-173.21)    2.07                30
 12/18/2021   11:01:18   (  78.01,  -5.90) 12/18/2021   11:01:57  (  78.02,  -5.97)    2.22                39
 12/18/2021   11:52:04   ( -78.03, 161.31) 12/18/2021   11:53:02  ( -78.03, 161.32)    0.53                58
 12/18/2021   12:42:50   (  78.03, -31.38) 12/18/2021   12:43:57  (  78.03, -31.44)    1.25                67