Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2020   21:49:49   (  -0.05,-128.22) (   0.76,-124.60)  411.74                80
 12/17/2020   10:13:58   (   0.09,-128.21) (   0.46,-129.78)  179.01                80
 12/18/2020   09:52:21   (   0.07,-128.22) (  -0.59,-125.20)  344.12                80
 12/19/2020   22:16:37   (  -0.11,-128.26) (  -0.61,-130.41)  245.66                80
 12/20/2020   21:55:01   (  -0.08,-128.27) (   0.44,-125.83)  277.16                80
 12/22/2020   10:19:10   (   0.12,-128.26) (   0.72,-131.02)  314.11                80
 12/23/2020   09:57:34   (   0.10,-128.27) (  -0.33,-126.44)  208.86                80
 12/24/2020   22:21:50   (  -0.14,-128.30) (  -0.86,-131.65)  380.86                80
 12/25/2020   22:00:13   (  -0.12,-128.30) (   0.13,-127.06)  141.57                80
 12/27/2020   10:24:22   (   0.16,-128.28) (   1.03,-132.24)  450.98                80
 12/28/2020   10:02:44   (   0.14,-128.28) (   0.03,-127.65)   71.32                80