Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 21.  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   ( -71.42, 124.73) 07/23/2020   15:24:44  ( -71.33, 127.06)   83.15                67
 07/23/2020   16:14:06   (  70.57, -66.53) 07/23/2020   16:14:23  (  70.58, -66.47)    2.30                17
 07/23/2020   17:04:48   ( -70.48, 100.94) 07/23/2020   17:03:53  ( -70.47, 101.00)    2.32                55
 07/26/2020   08:30:29   (  70.57,  49.39) 07/26/2020   08:30:53  (  70.57,  49.40)    0.44                24
 07/26/2020   09:21:11   ( -70.47,-143.13) 07/26/2020   09:20:23  ( -70.46,-143.13)    0.80                48
 07/29/2020   00:46:51   (  70.56, 165.32) 07/29/2020   00:47:22  (  70.56, 165.27)    1.88                31
 07/29/2020   01:37:33   ( -70.46, -27.21) 07/29/2020   01:36:52  ( -70.45, -27.26)    2.10                41
 07/31/2020   17:03:15   (  70.61, -78.85) 07/31/2020   17:03:51  (  70.60, -78.79)    2.25                36
 07/31/2020   17:53:57   ( -70.51,  88.63) 07/31/2020   17:53:21  ( -70.50,  88.69)    2.25                36
 08/03/2020   09:19:38   (  70.60,  37.07) 08/03/2020   09:20:21  (  70.59,  37.07)    1.89                43
 08/03/2020   10:10:20   ( -70.50,-155.45) 08/03/2020   10:09:51  ( -70.49,-155.45)    1.58                29