Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 1 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/10/2015   10:38:04   (  -0.10,-135.03) (   0.28,-136.76)  197.35                80
 01/11/2015   10:21:58   (  -0.10,-135.00) (  -0.73,-132.23)  316.34                80
 01/12/2015   22:41:11   (   0.10,-134.91) (  -0.46,-137.53)  298.12                80
 01/13/2015   22:25:03   (   0.10,-134.88) (   0.50,-132.98)  215.38                80
 01/15/2015   10:44:09   (  -0.10,-134.87) (   0.64,-138.26)  385.45                80
 01/16/2015   10:28:01   (  -0.09,-134.83) (  -0.33,-133.71)  127.39                80
 01/17/2015   22:47:14   (   0.10,-134.72) (  -0.86,-139.01)  488.84                80
 01/18/2015   22:31:08   (   0.09,-134.68) (   0.16,-134.48)   23.82                80
 01/21/2015   10:31:25   (  -0.09,-134.61) (   0.05,-135.19)   66.38                80
 01/22/2015   10:15:18   (  -0.09,-134.56) (  -0.98,-130.66)  445.41                80
 01/23/2015   22:34:31   (   0.09,-134.44) (  -0.27,-135.95)  172.25                80