Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 22.  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   08:55:25   ( -78.01,-155.30) 08/27/2021   08:54:18  ( -78.01,-158.34)   70.22                67
 08/27/2021   09:46:17   (  78.30,  10.46) 08/27/2021   09:45:09  (  78.27,  10.49)    2.61                68
 08/27/2021   10:37:01   ( -78.29, 177.81) 08/27/2021   10:36:11  ( -78.28, 177.79)    0.89                50
 08/27/2021   11:27:46   (  78.30, -14.92) 08/27/2021   11:27:09  (  78.28, -14.95)    1.89                37
 08/27/2021   12:18:30   ( -78.29, 152.42) 08/27/2021   12:18:11  ( -78.29, 152.35)    1.55                19
 08/27/2021   13:09:15   (  78.30, -40.31) 08/27/2021   13:09:09  (  78.29, -40.39)    2.02                 6
 08/27/2021   13:59:59   ( -78.30, 127.03) 08/27/2021   14:00:11  ( -78.30, 126.91)    2.83                12
 08/27/2021   14:50:43   (  78.31, -65.70) 08/27/2021   14:51:08  (  78.30, -65.83)    2.89                25
 08/27/2021   15:41:28   ( -78.34, 101.43) 08/27/2021   15:42:10  ( -78.31, 101.47)    3.22                42
 08/27/2021   16:32:13   (  78.35, -91.31) 08/27/2021   16:33:08  (  78.31, -91.26)    3.96                55
 08/27/2021   17:22:57   ( -78.34,  76.04) 08/27/2021   17:24:10  ( -78.32,  76.03)    2.38                73