Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/14/2018   10:30:55   (  -0.33,-135.16) (   0.02,-136.72)  177.41                80
 08/15/2018   10:14:51   (  -0.33,-135.13) (  -0.96,-132.18)  335.98                80
 08/16/2018   22:34:09   (   0.35,-135.12) (  -0.18,-137.50)  270.58                80
 08/17/2018   22:18:05   (   0.34,-135.09) (   0.81,-132.96)  242.67                80
 08/19/2018   10:37:13   (  -0.36,-135.02) (   0.39,-138.23)  366.97                80
 08/20/2018   10:21:10   (  -0.35,-134.98) (  -0.65,-133.71)  145.67                80
 08/21/2018   22:40:27   (   0.37,-134.95) (  -0.53,-139.01)  462.34                80
 08/22/2018   22:24:22   (   0.37,-134.92) (   0.45,-134.48)   50.19                80
 08/25/2018   10:24:47   (  -0.38,-134.80) (  -0.30,-135.22)   47.94                80
 08/26/2018   10:08:43   (  -0.37,-134.76) (  -1.28,-130.68)  463.97                80