Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 17.  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,-155.29) 08/27/2021   08:54:18  ( -78.02,-158.29)   69.42                67
 08/27/2021   09:46:17   (  78.30,  10.45) 08/27/2021   09:45:09  (  78.28,  10.51)    2.71                68
 08/27/2021   10:37:01   ( -78.29, 177.82) 08/27/2021   10:36:11  ( -78.29, 177.84)    0.57                50
 08/27/2021   11:27:46   (  78.30, -14.94) 08/27/2021   11:27:09  (  78.29, -14.93)    1.57                37
 08/27/2021   12:18:30   ( -78.29, 152.43) 08/27/2021   12:18:11  ( -78.30, 152.40)    1.19                19
 08/27/2021   13:09:15   (  78.30, -40.33) 08/27/2021   13:09:09  (  78.30, -40.36)    1.15                 6
 08/27/2021   13:59:58   ( -78.30, 127.04) 08/27/2021   14:00:10  ( -78.31, 126.96)    2.53                12
 08/27/2021   14:50:43   (  78.31, -65.71) 08/27/2021   14:51:08  (  78.31, -65.80)    1.98                25
 08/27/2021   15:41:28   ( -78.34, 101.43) 08/27/2021   15:42:10  ( -78.32, 101.52)    2.71                42
 08/27/2021   16:32:12   (  78.31, -91.10) 08/27/2021   16:33:08  (  78.32, -91.24)    3.19                56
 08/27/2021   17:22:57   ( -78.34,  76.05) 08/27/2021   17:24:10  ( -78.33,  76.08)    1.43                73