Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 22.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 07/23/2020   15:23:37   ( -71.44, 124.69) 07/23/2020   15:24:44  ( -71.30, 127.01)   83.93                67
 07/23/2020   16:14:05   (  70.54, -66.48) 07/23/2020   16:14:23  (  70.55, -66.51)    1.35                18
 07/23/2020   17:04:47   ( -70.45, 100.99) 07/23/2020   17:03:53  ( -70.44, 100.96)    1.79                54
 07/26/2020   08:30:29   (  70.59,  49.36) 07/26/2020   08:30:52  (  70.60,  49.44)    3.17                23
 07/26/2020   09:21:11   ( -70.49,-143.16) 07/26/2020   09:20:22  ( -70.49,-143.09)    2.77                49
 07/29/2020   00:46:52   (  70.58, 165.29) 07/29/2020   00:47:22  (  70.59, 165.31)    1.04                30
 07/29/2020   01:37:34   ( -70.48, -27.24) 07/29/2020   01:36:52  ( -70.48, -27.22)    0.53                42
 07/31/2020   17:03:15   (  70.57, -78.79) 07/31/2020   17:03:52  (  70.57, -78.83)    1.83                37
 07/31/2020   17:53:57   ( -70.47,  88.69) 07/31/2020   17:53:22  ( -70.47,  88.65)    1.80                35
 08/03/2020   09:19:38   (  70.61,  37.06) 08/03/2020   09:20:20  (  70.61,  37.11)    1.80                42
 08/03/2020   10:10:20   ( -70.51,-155.46) 08/03/2020   10:09:50  ( -70.51,-155.41)    1.88                30