Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/28/2019   10:05:43   (  -0.24,-128.19) (   0.26,-130.43)  256.21                80
 07/29/2019   09:49:38   (  -0.24,-128.21) (  -0.75,-125.90)  262.57                80
 07/30/2019   22:08:56   (   0.26,-128.21) (  -0.41,-131.21)  341.82                80
 07/31/2019   21:52:51   (   0.25,-128.23) (   0.60,-126.68)  176.76                80
 08/02/2019   10:11:59   (  -0.28,-128.28) (   0.55,-131.96)  418.91                80
 08/03/2019   09:55:55   (  -0.27,-128.30) (  -0.47,-127.43)   99.36                80
 08/05/2019   21:59:08   (   0.28,-128.31) (   0.32,-128.20)   12.65                80
 08/08/2019   09:59:32   (  -0.29,-128.37) (  -0.18,-128.95)   65.58                80
 08/09/2019   09:43:27   (  -0.28,-128.38) (  -1.19,-124.42)  452.14                80