Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 1 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/02/2015   22:31:40   (   0.09,-135.18) (   0.24,-134.54)   73.38                80
 01/05/2015   10:34:39   (  -0.09,-135.17) (  -0.08,-135.27)   12.00                80
 01/07/2015   22:35:06   (   0.10,-135.06) (  -0.11,-136.04)  110.90                80
 01/08/2015   22:18:59   (   0.09,-135.03) (   0.90,-131.50)  403.24                80
 01/10/2015   10:38:04   (  -0.10,-135.04) (   0.31,-136.76)  197.01                80
 01/11/2015   10:21:57   (  -0.09,-135.01) (  -0.71,-132.23)  316.68                80
 01/12/2015   22:41:11   (   0.10,-134.91) (  -0.49,-137.52)  297.70                80
 01/13/2015   22:25:04   (   0.10,-134.88) (   0.52,-132.99)  215.76                80
 01/15/2015   10:44:08   (  -0.10,-134.87) (   0.68,-138.25)  385.22                80