Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/11/2020   22:10:55   (   0.21,-127.78) (  -0.57,-131.14)  383.19                80
 04/12/2020   21:49:32   (   0.22,-127.82) (   0.51,-126.62)  136.68                80
 04/14/2020   10:13:59   (  -0.20,-127.87) (   0.69,-131.89)  457.60                80
 04/15/2020   09:52:34   (  -0.21,-127.90) (  -0.33,-127.36)   61.64                80
 04/17/2020   21:58:26   (   0.19,-127.97) (   0.16,-128.13)   18.00                80
 04/20/2020   10:01:29   (  -0.18,-128.05) (   0.02,-128.86)   92.86                80
 04/21/2020   09:40:05   (  -0.19,-128.08) (  -1.01,-124.33)  426.05                80
 04/22/2020   22:04:41   (   0.17,-128.11) (  -0.18,-129.64)  174.05                80
 04/23/2020   21:43:16   (   0.18,-128.14) (   0.84,-125.11)  344.96                80
 04/25/2020   10:07:44   (  -0.16,-128.18) (   0.35,-130.37)  249.89                80