Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/01/2020   22:17:23   (   0.04,-128.21) (  -0.72,-131.59)  384.86                80
 02/02/2020   21:55:48   (   0.03,-128.18) (   0.31,-127.01)  133.88                80
 02/04/2020   10:17:18   (  -0.03,-128.13) (   0.86,-132.21)  463.95                80
 02/05/2020   10:01:02   (  -0.03,-128.10) (  -0.12,-127.62)   54.49                80
 02/07/2020   22:03:46   (  -0.01,-128.03) (  -0.07,-128.27)   28.01                80
 02/08/2020   21:42:10   (  -0.01,-127.99) (   0.97,-123.70)  489.51                80
 02/10/2020   10:03:40   (   0.01,-127.92) (   0.20,-128.89)  109.99                80
 02/11/2020   09:47:24   (   0.01,-127.89) (  -0.77,-124.31)  407.54                80
 02/12/2020   22:09:04   (  -0.00,-127.84) (  -0.38,-129.55)  194.44                80
 02/13/2020   21:47:29   (  -0.00,-127.80) (   0.65,-124.97)  322.77                80