Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 20.  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)
 08/22/2020   03:14:30   (  71.31, 127.28) 08/22/2020   03:15:38  (  71.23, 129.22)   69.69                68
 08/22/2020   04:04:59   ( -70.56, -64.14) 08/22/2020   04:05:18  ( -70.59, -64.15)    2.80                19
 08/22/2020   04:55:43   (  70.47, 103.32) 08/22/2020   04:54:45  (  70.48, 103.33)    1.07                58
 08/24/2020   20:21:22   ( -70.57,  51.76) 08/24/2020   20:21:50  ( -70.56,  51.69)    2.82                28
 08/24/2020   21:12:06   (  70.48,-140.78) 08/24/2020   21:11:17  (  70.45,-140.83)    3.14                49
 08/27/2020   12:37:46   ( -70.63, 167.58) 08/27/2020   12:38:21  ( -70.62, 167.64)    2.56                35
 08/27/2020   13:28:29   (  70.48, -24.88) 08/27/2020   13:27:48  (  70.50, -24.89)    2.08                41
 08/30/2020   04:54:09   ( -70.64, -76.52) 08/30/2020   04:54:53  ( -70.63, -76.47)    2.11                44
 08/30/2020   05:44:52   (  70.49,  91.02) 08/30/2020   05:44:20  (  70.51,  91.00)    2.48                32
 09/01/2020   21:10:31   ( -70.65,  39.37) 09/01/2020   21:11:24  ( -70.66,  39.44)    2.95                53
 09/01/2020   22:01:15   (  70.56,-153.17) 09/01/2020   22:00:51  (  70.54,-153.08)    3.31                24