Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 7.  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   ( -77.62, -69.70) 12/18/2021   03:23:12  ( -77.63, -73.41)   88.33                65
 12/18/2021   04:15:12   (  77.99,  95.74) 12/18/2021   04:13:58  (  77.97,  95.70)    2.85                74
 12/18/2021   05:05:58   ( -78.00, -97.02) 12/18/2021   05:05:03  ( -77.99, -96.96)    2.36                55
 12/18/2021   05:56:44   (  78.01,  70.25) 12/18/2021   05:55:58  (  77.97,  70.24)    4.26                46
 12/18/2021   06:47:29   ( -77.98,-122.29) 12/18/2021   06:47:03  ( -77.99,-122.43)    3.24                26
 12/18/2021   07:38:15   (  77.99,  44.98) 12/18/2021   07:37:57  (  78.02,  44.99)    2.93                18
 12/18/2021   08:29:01   ( -78.00,-147.78) 12/18/2021   08:29:03  ( -78.00,-147.89)    2.71                 2
 12/18/2021   09:19:47   (  78.01,  19.49) 12/18/2021   09:19:57  (  78.02,  19.53)    1.65                10
 12/18/2021   10:10:33   ( -78.02,-173.26) 12/18/2021   10:11:03  ( -78.00,-173.35)    3.05                30
 12/18/2021   11:01:19   (  78.03,  -5.99) 12/18/2021   11:01:57  (  78.03,  -5.93)    1.47                38
 12/18/2021   11:52:05   ( -78.04, 161.25) 12/18/2021   11:53:02  ( -78.05, 161.40)    3.40                57
 12/18/2021   12:42:51   (  78.05, -31.48) 12/18/2021   12:43:57  (  78.04, -31.39)    2.62                66