Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/08/2018   22:40:37   (  -0.27,-135.61) (  -0.99,-138.96)  380.42                80
 10/09/2018   22:24:32   (  -0.28,-135.61) (  -0.02,-134.42)  135.96                80
 10/11/2018   10:43:40   (   0.26,-135.65) (   1.18,-139.70)  462.03                80
 10/12/2018   10:27:36   (   0.27,-135.64) (   0.15,-135.17)   53.44                80
 10/14/2018   22:28:07   (  -0.26,-135.57) (  -0.31,-135.95)   42.79                80
 10/15/2018   22:12:02   (  -0.27,-135.56) (   0.65,-131.41)  472.76                80
 10/17/2018   10:31:10   (   0.24,-135.59) (   0.51,-136.69)  126.27                80
 10/18/2018   10:15:06   (   0.25,-135.57) (  -0.51,-132.17)  388.35                80
 10/19/2018   22:34:22   (  -0.22,-135.50) (  -0.68,-137.47)  225.16                80
 10/20/2018   22:18:18   (  -0.23,-135.49) (   0.34,-132.95)  289.70                80