Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2020   09:52:34   (  -0.21,-127.89) (  -0.31,-127.35)   61.03                80
 04/17/2020   21:58:26   (   0.19,-127.96) (   0.13,-128.12)   18.86                80
 04/20/2020   10:01:30   (  -0.18,-128.03) (  -0.01,-128.87)   94.69                80
 04/21/2020   09:40:05   (  -0.19,-128.06) (  -1.04,-124.34)  424.01                80
 04/22/2020   22:04:41   (   0.17,-128.09) (  -0.16,-129.64)  175.93                80
 04/23/2020   21:43:17   (   0.18,-128.12) (   0.87,-125.11)  342.86                80
 04/25/2020   10:07:44   (  -0.15,-128.16) (   0.33,-130.38)  252.87                80
 04/26/2020   09:46:20   (  -0.17,-128.17) (  -0.69,-125.85)  265.00                80
 04/27/2020   22:10:56   (   0.14,-128.19) (  -0.49,-131.15)  336.84                80
 04/28/2020   21:49:32   (   0.16,-128.20) (   0.53,-126.62)  181.06                80