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)
 04/17/2020   21:55:47   (   0.19,-127.96) (   0.18,-128.13)   18.94                80
 04/20/2020   10:01:29   (  -0.18,-128.03) (  -0.00,-128.87)   94.82                80
 04/21/2020   09:40:05   (  -0.19,-128.06) (  -1.03,-124.34)  423.84                80
 04/22/2020   22:04:41   (   0.17,-128.09) (  -0.17,-129.64)  176.09                80
 04/23/2020   21:43:17   (   0.18,-128.12) (   0.86,-125.11)  342.66                80
 04/25/2020   10:07:44   (  -0.15,-128.15) (   0.34,-130.37)  253.14                80
 04/26/2020   09:46:20   (  -0.17,-128.17) (  -0.69,-125.85)  264.71                80
 04/27/2020   22:10:56   (   0.14,-128.19) (  -0.50,-131.15)  337.12                80
 04/28/2020   21:49:31   (   0.16,-128.20) (   0.53,-126.62)  180.75                80