Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 6.  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   ( -77.60, -69.63) 12/18/2021   03:23:13  ( -77.60, -73.58)   94.12                64
 12/18/2021   04:15:12   (  77.98,  95.80) 12/18/2021   04:13:58  (  77.97,  95.73)    1.73                74
 12/18/2021   05:05:58   ( -77.99, -96.95) 12/18/2021   05:05:03  ( -77.99, -96.92)    0.59                55
 12/18/2021   05:56:44   (  78.00,  70.32) 12/18/2021   05:55:58  (  77.98,  70.27)    2.43                46
 12/18/2021   06:47:30   ( -78.01,-122.43) 12/18/2021   06:47:03  ( -78.00,-122.39)    1.66                27
 12/18/2021   07:38:16   (  78.02,  44.83) 12/18/2021   07:37:58  (  77.99,  44.81)    3.74                18
 12/18/2021   08:29:02   ( -78.03,-147.92) 12/18/2021   08:29:03  ( -78.00,-147.85)    3.20                 1
 12/18/2021   09:19:47   (  78.00,  19.56) 12/18/2021   09:19:57  (  78.03,  19.57)    3.46                10
 12/18/2021   10:10:33   ( -78.01,-173.19) 12/18/2021   10:11:03  ( -78.01,-173.32)    2.95                30
 12/18/2021   11:01:18   (  78.02,  -5.92) 12/18/2021   11:01:56  (  78.04,  -5.90)    2.05                38
 12/18/2021   11:52:04   ( -78.03, 161.33) 12/18/2021   11:53:02  ( -78.02, 161.22)    2.89                58
 12/18/2021   12:42:50   (  78.04, -31.41) 12/18/2021   12:43:56  (  78.04, -31.36)    1.29                66