Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 15.  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)
 08/27/2021   08:55:24   ( -77.99,-155.18) 08/27/2021   08:54:18  ( -77.99,-158.47)   76.15                66
 08/27/2021   09:46:16   (  78.28,  10.55) 08/27/2021   09:45:08  (  78.28,  10.54)    0.41                68
 08/27/2021   10:37:00   ( -78.27, 177.93) 08/27/2021   10:36:10  ( -78.30, 177.88)    3.32                50
 08/27/2021   11:27:45   (  78.28, -14.83) 08/27/2021   11:27:08  (  78.29, -14.90)    1.77                37
 08/27/2021   12:18:30   ( -78.31, 152.32) 08/27/2021   12:18:10  ( -78.31, 152.44)    2.73                20
 08/27/2021   13:09:14   (  78.29, -40.22) 08/27/2021   13:09:08  (  78.30, -40.33)    3.14                 6
 08/27/2021   13:59:59   ( -78.31, 126.93) 08/27/2021   14:00:10  ( -78.32, 127.00)    1.48                11
 08/27/2021   14:50:44   (  78.33, -65.83) 08/27/2021   14:51:08  (  78.31, -65.77)    2.17                24
 08/27/2021   15:41:28   ( -78.32, 101.55) 08/27/2021   15:42:10  ( -78.33, 101.56)    0.94                42
 08/27/2021   16:32:13   (  78.33, -91.21) 08/27/2021   16:33:08  (  78.32, -91.21)    0.96                55
 08/27/2021   17:22:57   ( -78.32,  76.16) 08/27/2021   17:24:10  ( -78.33,  76.12)    1.86                73