Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 2 10.  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   ( -78.76, -70.14) 02/16/2021   02:51:32  ( -78.74, -70.47)    7.39                75
 02/16/2021   03:43:33   (  78.79,  96.94) 02/16/2021   03:42:32  (  78.78,  97.06)    3.03                61
 02/16/2021   04:34:17   ( -78.79, -95.75) 02/16/2021   04:33:31  ( -78.79, -95.61)    2.95                46
 02/16/2021   05:25:01   (  78.79,  71.56) 02/16/2021   05:24:31  (  78.80,  71.67)    2.33                30
 02/16/2021   06:15:45   ( -78.79,-121.12) 02/16/2021   06:15:30  ( -78.81,-121.00)    2.90                15
 02/16/2021   07:06:30   (  78.79,  46.19) 02/16/2021   07:06:31  (  78.81,  46.28)    2.58                 1
 02/16/2021   07:57:14   ( -78.79,-146.49) 02/16/2021   07:57:31  ( -78.79,-146.64)    3.28                17
 02/16/2021   08:47:59   (  78.80,  20.82) 02/16/2021   08:48:31  (  78.82,  20.88)    3.56                32
 02/16/2021   09:38:43   ( -78.80,-171.87) 02/16/2021   09:39:31  ( -78.80,-172.03)    3.62                48
 02/16/2021   10:29:29   (  78.83,  -4.80) 02/16/2021   10:30:32  (  78.80,  -4.76)    3.19                63