Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 11 12.  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)
 11/13/2020   06:14:01   ( -70.79, -96.47) 11/13/2020   06:15:13  ( -70.77, -96.33)    5.28                72
 11/13/2020   07:04:43   (  70.62,  71.12) 11/13/2020   07:04:41  (  70.62,  71.08)    1.34                 2
 11/13/2020   07:55:24   ( -70.47,-121.32) 11/13/2020   07:54:11  ( -70.50,-121.46)    5.85                73
 11/15/2020   22:30:26   ( -71.00,  19.10) 11/15/2020   22:31:38  ( -70.89,  19.73)   26.38                72
 11/15/2020   23:21:04   (  70.63,-172.98) 11/15/2020   23:21:08  (  70.63,-173.02)    1.75                 4
 11/16/2020   00:11:46   ( -70.53,  -5.50) 11/16/2020   00:10:38  ( -70.51,  -5.56)    3.22                68
 11/18/2020   14:46:52   ( -71.22, 134.64) 11/18/2020   14:48:02  ( -71.11, 135.97)   48.97                70
 11/18/2020   15:37:26   (  70.65, -57.08) 11/18/2020   15:37:36  (  70.63, -57.13)    2.79                10
 11/18/2020   16:28:08   ( -70.54, 110.41) 11/18/2020   16:27:05  ( -70.57, 110.41)    3.43                63
 11/21/2020   07:03:18   ( -71.44,-109.82) 11/21/2020   07:04:26  ( -71.33,-107.80)   72.74                68
 11/21/2020   07:53:48   (  70.66,  58.82) 11/21/2020   07:54:03  (  70.68,  58.83)    2.15                15
 11/21/2020   08:44:30   ( -70.55,-133.69) 11/21/2020   08:43:33  ( -70.57,-133.70)    2.12                57
 11/23/2020   23:19:44   ( -71.66,   5.70) 11/23/2020   23:20:50  ( -71.54,   8.43)   96.76                66
 11/24/2020   00:10:10   (  70.68, 174.71) 11/24/2020   00:10:31  (  70.67, 174.70)    0.90                21
 11/24/2020   01:00:52   ( -70.57, -17.79) 11/24/2020   01:00:01  ( -70.57, -17.82)    1.05                51
 11/26/2020   16:26:31   (  70.70, -69.40) 11/26/2020   16:26:57  (  70.71, -69.35)    2.39                26
 11/26/2020   17:17:13   ( -70.59,  98.10) 11/26/2020   17:16:27  ( -70.61,  98.13)    2.87                46