Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 5.  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   03:24:16   ( -77.59, -69.56) 12/18/2021   03:23:12  ( -77.61, -73.51)   94.27                64
 12/18/2021   04:15:11   (  77.97,  95.88) 12/18/2021   04:13:57  (  77.98,  95.80)    2.74                74
 12/18/2021   05:05:57   ( -77.98, -96.87) 12/18/2021   05:05:02  ( -78.00, -96.86)    3.12                55
 12/18/2021   05:56:43   (  77.99,  70.39) 12/18/2021   05:55:57  (  77.99,  70.34)    1.36                46
 12/18/2021   06:47:29   ( -78.00,-122.36) 12/18/2021   06:47:02  ( -78.01,-122.32)    1.79                27
 12/18/2021   07:38:15   (  78.01,  44.91) 12/18/2021   07:37:57  (  78.00,  44.88)    1.16                18
 12/18/2021   08:29:01   ( -78.02,-147.84) 12/18/2021   08:29:02  ( -78.02,-147.78)    1.33                 1
 12/18/2021   09:19:47   (  78.02,  19.42) 12/18/2021   09:19:57  (  78.00,  19.41)    2.45                10
 12/18/2021   10:10:33   ( -78.04,-173.33) 12/18/2021   10:11:02  ( -78.02,-173.25)    2.34                29
 12/18/2021   11:01:19   (  78.04,  -6.06) 12/18/2021   11:01:57  (  78.01,  -6.05)    3.97                38
 12/18/2021   11:52:04   ( -78.02, 161.40) 12/18/2021   11:53:02  ( -78.03, 161.29)    2.97                58
 12/18/2021   12:42:50   (  78.02, -31.34) 12/18/2021   12:43:56  (  78.05, -31.29)    3.36                66