Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/17/2017   22:34:26   (  -0.05,-134.90) (  -0.62,-137.55)  301.80                80
 11/18/2017   22:18:20   (  -0.06,-134.94) (   0.36,-133.02)  218.72                80
 11/20/2017   10:37:28   (   0.04,-135.08) (   0.75,-138.30)  366.46                80
 11/21/2017   10:21:23   (   0.05,-135.11) (  -0.22,-133.76)  153.54                80
 11/22/2017   22:40:39   (  -0.03,-135.06) (  -0.95,-139.07)  457.35                80
 11/23/2017   22:24:35   (  -0.04,-135.09) (   0.09,-134.54)   62.32                80
 11/26/2017   10:24:58   (   0.03,-135.25) (   0.04,-135.29)    4.56                80
 11/28/2017   22:28:08   (  -0.02,-135.21) (  -0.23,-136.06)   97.45                80
 11/29/2017   22:12:04   (  -0.03,-135.23) (   0.82,-131.54)  421.42                80
 12/01/2017   10:31:11   (   0.01,-135.35) (   0.36,-136.81)  166.14                80