Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 10 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2020   22:24:35   (   0.13,-128.41) (  -0.80,-132.68)  486.78                80
 10/12/2020   22:02:59   (   0.14,-128.40) (   0.23,-128.10)   34.45                80
 10/15/2020   10:08:11   (  -0.14,-128.39) (  -0.06,-128.70)   35.75                80
 10/16/2020   09:49:14   (  -0.14,-128.38) (  -1.09,-124.12)  485.31                80
 10/17/2020   22:10:52   (   0.13,-128.35) (  -0.09,-129.34)  113.34                80
 10/18/2020   21:49:16   (   0.14,-128.33) (   0.94,-124.76)  407.09                80
 10/20/2020   10:13:24   (  -0.13,-128.32) (   0.26,-129.94)  185.51                80
 10/21/2020   09:51:48   (  -0.14,-128.30) (  -0.77,-125.36)  334.74                80
 10/22/2020   22:16:06   (   0.13,-128.26) (  -0.40,-130.58)  264.66                80
 10/23/2020   21:54:30   (   0.14,-128.24) (   0.63,-126.00)  255.11                80