Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 11.  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, -73.39)   86.88                65
 12/18/2021   04:15:12   (  78.00,  95.69) 12/18/2021   04:13:58  (  77.97,  95.72)    3.12                74
 12/18/2021   05:05:57   ( -77.97, -96.86) 12/18/2021   05:05:03  ( -77.99, -96.95)    2.73                54
 12/18/2021   05:56:43   (  77.98,  70.42) 12/18/2021   05:55:58  (  77.98,  70.26)    3.66                45
 12/18/2021   06:47:29   ( -77.99,-122.34) 12/18/2021   06:47:03  ( -77.99,-122.41)    1.64                26
 12/18/2021   07:38:15   (  78.00,  44.93) 12/18/2021   07:37:57  (  78.02,  45.02)    3.20                18
 12/18/2021   08:29:01   ( -78.01,-147.83) 12/18/2021   08:29:03  ( -78.00,-147.88)    1.79                 2
 12/18/2021   09:19:47   (  78.02,  19.45) 12/18/2021   09:19:57  (  78.03,  19.56)    2.69                10
 12/18/2021   10:10:33   ( -78.03,-173.31) 12/18/2021   10:11:03  ( -78.01,-173.34)    3.00                30
 12/18/2021   11:01:19   (  78.04,  -6.04) 12/18/2021   11:01:57  (  78.03,  -5.91)    3.10                38
 12/18/2021   11:52:03   ( -78.01, 161.41) 12/18/2021   11:53:01  ( -78.05, 161.41)    4.15                58
 12/18/2021   12:42:49   (  78.02, -31.31) 12/18/2021   12:43:56  (  78.04, -31.37)    2.69                67