Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 8 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)
 08/23/2019   16:07:44   ( -70.48, 114.87) 08/23/2019   16:08:31  ( -70.46, 114.89)    2.00                47
 08/23/2019   16:58:28   (  70.37, -77.65) 08/23/2019   16:57:58  (  70.36, -77.62)    1.59                30
 08/26/2019   08:24:10   ( -70.44,-129.19) 08/26/2019   08:25:01  ( -70.44,-129.25)    2.18                51
 08/26/2019   09:14:54   (  70.33,  38.29) 08/26/2019   09:14:28  (  70.34,  38.24)    2.03                26
 08/26/2019   10:05:19   ( -69.38,-152.97) 08/26/2019   10:04:13  ( -69.41,-155.43)   96.34                66
 08/29/2019   00:40:37   ( -70.47, -13.34) 08/29/2019   00:41:30  ( -70.48, -13.31)    1.92                53
 08/29/2019   01:31:21   (  70.36, 154.14) 08/29/2019   01:30:57  (  70.37, 154.17)    1.91                24
 08/29/2019   02:21:47   ( -69.51, -37.26) 08/29/2019   02:20:39  ( -69.56, -39.35)   81.20                68
 08/31/2019   16:57:02   ( -70.44, 102.59) 08/31/2019   16:57:59  ( -70.46, 102.54)    3.27                57
 08/31/2019   17:47:46   (  70.33, -89.93) 08/31/2019   17:47:26  (  70.35, -89.99)    3.11                20
 08/31/2019   18:38:15   ( -69.59,  78.51) 08/31/2019   18:37:07  ( -69.64,  76.65)   72.25                68
 09/03/2019   09:13:29   ( -70.46,-141.56) 09/03/2019   09:14:28  ( -70.49,-141.54)    3.16                59
 09/03/2019   10:04:13   (  70.35,  25.92) 09/03/2019   10:03:55  (  70.37,  25.94)    2.41                18