Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 8.  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, -69.77) 12/18/2021   03:23:12  ( -77.63, -73.42)   86.87                65
 12/18/2021   04:15:11   (  77.97,  95.87) 12/18/2021   04:13:58  (  77.97,  95.69)    4.22                73
 12/18/2021   05:05:57   ( -77.98, -96.88) 12/18/2021   05:05:03  ( -77.98, -96.97)    2.23                54
 12/18/2021   05:56:43   (  77.99,  70.39) 12/18/2021   05:55:57  (  78.01,  70.45)    3.11                46
 12/18/2021   06:47:29   ( -78.00,-122.37) 12/18/2021   06:47:03  ( -77.99,-122.44)    1.80                26
 12/18/2021   07:38:15   (  78.01,  44.90) 12/18/2021   07:37:57  (  78.02,  44.99)    2.29                18
 12/18/2021   08:29:01   ( -78.02,-147.85) 12/18/2021   08:29:03  ( -78.00,-147.90)    2.59                 2
 12/18/2021   09:19:47   (  78.03,  19.42) 12/18/2021   09:19:57  (  78.02,  19.52)    2.50                10
 12/18/2021   10:10:33   ( -78.04,-173.34) 12/18/2021   10:11:03  ( -78.00,-173.36)    3.92                30
 12/18/2021   11:01:18   (  78.00,  -5.86) 12/18/2021   11:01:57  (  78.03,  -5.94)    3.22                39
 12/18/2021   11:52:04   ( -78.02, 161.39) 12/18/2021   11:53:02  ( -78.05, 161.39)    3.22                58
 12/18/2021   12:42:50   (  78.02, -31.34) 12/18/2021   12:43:57  (  78.03, -31.40)    1.70                67