Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 6 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)
 06/21/2020   11:16:13   (  71.18,   6.88) 06/21/2020   11:17:22  (  71.07,   8.44)   57.61                69
 06/21/2020   12:06:44   ( -70.54, 175.28) 06/21/2020   12:07:00  ( -70.52, 175.23)    2.76                16
 06/21/2020   12:57:28   (  70.45, -17.27) 06/21/2020   12:56:27  (  70.42, -17.27)    2.82                61
 06/24/2020   03:32:41   (  71.42, 122.37) 06/24/2020   03:33:48  (  71.31, 124.71)   84.26                67
 06/24/2020   04:23:08   ( -70.56, -68.86) 06/24/2020   04:23:30  ( -70.55, -68.84)    1.92                22
 06/24/2020   05:13:51   (  70.43,  98.67) 06/24/2020   05:12:57  (  70.45,  98.65)    2.42                54
 06/26/2020   20:39:31   ( -70.59,  47.01) 06/26/2020   20:39:59  ( -70.58,  47.08)    3.12                28
 06/26/2020   21:30:14   (  70.46,-145.47) 06/26/2020   21:29:26  (  70.47,-145.43)    2.00                48
 06/29/2020   12:55:54   ( -70.57, 162.96) 06/29/2020   12:56:30  ( -70.55, 162.91)    2.80                36
 06/29/2020   13:46:37   (  70.44, -29.53) 06/29/2020   13:45:57  (  70.44, -29.60)    2.46                40
 07/02/2020   05:12:18   ( -70.60, -81.18) 07/02/2020   05:13:00  ( -70.57, -81.17)    2.87                42
 07/02/2020   06:03:01   (  70.48,  86.32) 07/02/2020   06:02:27  (  70.46,  86.31)    1.79                34
 07/04/2020   21:28:41   ( -70.57,  34.77) 07/04/2020   21:29:30  ( -70.59,  34.74)    2.32                49
 07/04/2020   22:19:24   (  70.46,-157.74) 07/04/2020   22:18:57  (  70.48,-157.78)    2.77                27