Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 2 3.  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)
 02/16/2021   02:52:47   ( -78.74, -69.99) 02/16/2021   02:51:33  ( -78.71, -70.70)   15.69                74
 02/16/2021   03:43:33   (  78.78,  97.04) 02/16/2021   03:42:32  (  78.78,  97.05)    0.29                61
 02/16/2021   04:34:17   ( -78.77, -95.61) 02/16/2021   04:33:31  ( -78.79, -95.60)    2.29                46
 02/16/2021   05:25:02   (  78.78,  71.67) 02/16/2021   05:24:32  (  78.79,  71.66)    1.81                30
 02/16/2021   06:15:46   ( -78.77,-120.98) 02/16/2021   06:15:31  ( -78.81,-120.99)    3.89                15
 02/16/2021   07:06:31   (  78.78,  46.30) 02/16/2021   07:06:32  (  78.81,  46.26)    3.39                 1
 02/16/2021   07:57:16   ( -78.81,-146.59) 02/16/2021   07:57:32  ( -78.79,-146.63)    2.48                16
 02/16/2021   08:48:00   (  78.82,  20.68) 02/16/2021   08:48:32  (  78.79,  20.62)    3.33                32
 02/16/2021   09:38:44   ( -78.81,-171.96) 02/16/2021   09:39:31  ( -78.80,-172.02)    1.46                47
 02/16/2021   10:29:29   (  78.82,  -4.69) 02/16/2021   10:30:32  (  78.80,  -4.78)    2.38                63
 02/16/2021   11:20:17   ( -78.95, 161.69) 02/16/2021   11:21:28  ( -78.92, 163.35)   35.58                71