Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/26/2020   10:11:22   (   0.03,-128.02) (   0.40,-129.80)  201.75                80
 06/27/2020   09:49:46   (   0.02,-128.05) (  -0.60,-125.21)  323.05                80
 06/28/2020   22:14:05   (  -0.03,-128.04) (  -0.55,-130.45)  274.04                80
 06/29/2020   21:52:29   (  -0.03,-128.06) (   0.46,-125.86)  250.77                80
 07/01/2020   10:16:39   (   0.03,-128.16) (   0.67,-131.06)  330.51                80
 07/02/2020   09:55:03   (   0.02,-128.18) (  -0.34,-126.48)  193.58                80
 07/03/2020   22:19:22   (  -0.03,-128.16) (  -0.81,-131.71)  405.07                80
 07/04/2020   21:57:45   (  -0.02,-128.18) (   0.20,-127.13)  119.00                80
 07/06/2020   10:21:56   (   0.02,-128.27) (   0.94,-132.33)  462.96                80
 07/07/2020   10:00:20   (   0.02,-128.28) (  -0.13,-127.76)   60.87                80