Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 7.  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)
 01/07/2020   07:46:59   ( -70.50,-120.03) 01/07/2020   07:47:56  ( -70.50,-119.95)    2.96                57
 01/07/2020   08:37:43   (  70.38,  47.47) 01/07/2020   08:37:23  (  70.39,  47.54)    3.14                20
 01/07/2020   09:28:12   ( -69.65,-144.10) 01/07/2020   09:27:03  ( -69.74,-145.76)   64.62                69
 01/10/2020   00:03:24   ( -70.50,  -4.13) 01/10/2020   00:04:25  ( -70.50,  -4.07)    2.11                61
 01/10/2020   00:54:08   (  70.38, 163.37) 01/10/2020   00:53:52  (  70.39, 163.42)    2.41                16
 01/10/2020   01:44:40   ( -69.81, -28.43) 01/10/2020   01:43:30  ( -69.85, -29.73)   49.83                70
 01/12/2020   16:19:49   ( -70.49, 111.78) 01/12/2020   16:20:54  ( -70.51, 111.83)    2.79                65
 01/12/2020   17:10:33   (  70.38, -80.73) 01/12/2020   17:10:21  (  70.40, -80.69)    3.22                12
 01/12/2020   18:01:08   ( -69.96,  87.23) 01/12/2020   17:59:56  ( -70.03,  86.40)   32.34                72
 01/15/2020   08:36:13   ( -70.49,-132.33) 01/15/2020   08:37:23  ( -70.48,-132.34)    1.41                70
 01/15/2020   09:26:57   (  70.38,  35.17) 01/15/2020   09:26:50  (  70.37,  35.14)    1.40                 7
 01/15/2020   10:17:35   ( -70.12,-157.11) 01/15/2020   10:16:22  ( -70.16,-157.53)   16.40                73
 01/18/2020   00:52:40   ( -70.60, -16.60) 01/18/2020   00:53:51  ( -70.57, -16.33)   10.46                71
 01/18/2020   01:43:22   (  70.38, 151.06) 01/18/2020   01:43:19  (  70.41, 151.07)    2.36                 3
 01/18/2020   02:34:03   ( -70.28, -41.46) 01/18/2020   02:32:49  ( -70.31, -41.45)    2.81                74
 01/20/2020   17:09:08   ( -70.76,  99.04) 01/20/2020   17:10:19  ( -70.68,  99.70)   26.17                71
 01/20/2020   17:59:47   (  70.39, -93.06) 01/20/2020   17:59:49  (  70.40, -93.07)    0.85                 2
 01/20/2020   18:50:28   ( -70.29,  74.43) 01/20/2020   18:49:19  ( -70.30,  74.42)    1.63                69