Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 16.  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)   86.87                65
 12/18/2021   04:15:12   (  77.99,  95.72) 12/18/2021   04:13:58  (  77.98,  95.74)    2.17                74
 12/18/2021   05:05:57   ( -77.97, -96.86) 12/18/2021   05:05:03  ( -77.99, -96.95)    2.80                54
 12/18/2021   05:56:44   (  78.01,  70.23) 12/18/2021   05:55:58  (  77.98,  70.28)    3.80                46
 12/18/2021   06:47:29   ( -77.99,-122.34) 12/18/2021   06:47:03  ( -78.00,-122.41)    1.66                26
 12/18/2021   07:38:15   (  77.99,  44.96) 12/18/2021   07:37:58  (  77.99,  44.82)    3.26                17
 12/18/2021   08:29:00   ( -78.01,-147.83) 12/18/2021   08:29:02  ( -78.00,-147.88)    1.69                 2
 12/18/2021   09:19:46   (  78.01,  19.47) 12/18/2021   09:19:56  (  78.03,  19.57)    3.13                10
 12/18/2021   10:10:32   ( -78.03,-173.31) 12/18/2021   10:11:02  ( -78.01,-173.34)    2.86                30
 12/18/2021   11:01:18   (  78.03,  -6.02) 12/18/2021   11:01:56  (  78.04,  -5.89)    3.01                38
 12/18/2021   11:52:03   ( -78.01, 161.41) 12/18/2021   11:53:01  ( -78.05, 161.41)    4.30                58
 12/18/2021   12:42:49   (  78.01, -31.29) 12/18/2021   12:43:56  (  78.04, -31.35)    3.61                67