Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/05/2018   22:40:17   (   0.30,-135.40) (  -0.51,-138.99)  409.60                80
 08/06/2018   22:24:12   (   0.29,-135.38) (   0.47,-134.45)  104.81                80
 08/09/2018   10:24:37   (  -0.31,-135.29) (  -0.31,-135.20)    9.80                80
 08/11/2018   22:27:51   (   0.32,-135.26) (   0.16,-135.98)   82.66                80
 08/12/2018   22:11:47   (   0.31,-135.23) (   1.14,-131.44)  430.97                80
 08/14/2018   10:30:56   (  -0.33,-135.15) (   0.00,-136.72)  178.40                80
 08/15/2018   10:14:51   (  -0.32,-135.13) (  -0.98,-132.19)  334.86                80
 08/16/2018   22:34:09   (   0.34,-135.11) (  -0.21,-137.49)  271.84                80
 08/17/2018   22:18:05   (   0.34,-135.08) (   0.84,-132.97)  241.35                80
 08/19/2018   10:37:13   (  -0.36,-135.00) (   0.37,-138.24)  368.46                80