Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/08/2021   10:08:57   (   0.43,-127.48) (   0.62,-128.21)   84.24                80
 02/09/2021   09:47:20   (   0.41,-127.52) (  -0.45,-123.63)  442.68                80
 02/10/2021   22:11:37   (  -0.44,-127.61) (  -0.74,-128.85)  140.96                80
 02/11/2021   21:50:01   (  -0.43,-127.66) (   0.33,-124.27)  385.96                80
 02/13/2021   10:14:08   (   0.45,-127.69) (   0.87,-129.44)  200.39                80
 02/14/2021   09:52:32   (   0.44,-127.73) (  -0.20,-124.86)  326.43                80
 02/15/2021   22:16:49   (  -0.46,-127.82) (  -0.99,-130.08)  257.62                80
 02/16/2021   21:55:13   (  -0.45,-127.86) (   0.08,-125.50)  269.15                80
 02/18/2021   10:19:20   (   0.47,-127.89) (   1.12,-130.67)  317.77                80
 02/19/2021   09:57:43   (   0.47,-127.92) (   0.05,-126.10)  208.57                80
 02/20/2021   22:22:01   (  -0.49,-128.01) (  -1.23,-131.31)  376.72                80