Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 7 18.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2019   23:25:11   (  69.63,-173.23) 07/18/2019   23:26:19  (  69.50,-171.45)   70.86                68
 07/19/2019   00:15:39   ( -68.79,  -4.74) 07/19/2019   00:16:00  ( -68.78,  -4.74)    0.95                21
 07/19/2019   01:06:22   (  68.66, 162.75) 07/19/2019   01:05:27  (  68.67, 162.77)    1.36                55
 07/21/2019   15:41:39   (  69.69, -57.43) 07/21/2019   15:42:46  (  69.61, -55.41)   78.49                67
 07/21/2019   16:32:06   ( -68.80, 111.14) 07/21/2019   16:32:29  ( -68.79, 111.15)    0.61                23
 07/21/2019   17:22:49   (  68.67, -81.37) 07/21/2019   17:21:56  (  68.68, -81.35)    1.28                53
 07/24/2019   07:58:07   (  69.75,  58.37) 07/24/2019   07:59:14  (  69.67,  60.54)   84.37                67
 07/24/2019   08:48:33   ( -68.80,-132.98) 07/24/2019   08:48:58  ( -68.80,-132.97)    0.60                25
 07/24/2019   09:39:15   (  68.67,  34.50) 07/24/2019   09:38:24  (  68.68,  34.53)    1.30                51
 07/27/2019   00:14:35   (  69.86, 174.09) 07/27/2019   00:15:41  (  69.73, 176.50)   93.91                66
 07/27/2019   01:04:59   ( -68.81, -17.10) 07/27/2019   01:05:26  ( -68.81, -17.08)    0.92                27
 07/27/2019   01:55:42   (  68.68, 150.38) 07/27/2019   01:54:53  (  68.68, 150.41)    1.43                49
 07/29/2019   16:31:03   (  69.92, -70.12) 07/29/2019   16:32:09  (  69.79, -67.54)   99.82                66
 07/29/2019   17:21:26   ( -68.81,  98.77) 07/29/2019   17:21:55  ( -68.81,  98.81)    1.35                29
 07/29/2019   18:12:09   (  68.68, -93.74) 07/29/2019   18:11:22  (  68.69, -93.70)    1.65                47