Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2017   10:14:29   (  -0.21,-134.86) (  -0.86,-132.11)  314.69                80
 07/28/2017   22:33:47   (   0.23,-134.84) (  -0.36,-137.41)  293.64                80
 07/29/2017   22:17:43   (   0.22,-134.80) (   0.66,-132.88)  218.61                80
 07/31/2017   10:36:52   (  -0.25,-134.71) (   0.50,-138.16)  392.80                80
 08/01/2017   10:20:48   (  -0.24,-134.67) (  -0.47,-133.62)  118.72                80
 08/02/2017   22:40:06   (   0.26,-134.62) (  -0.69,-138.94)  491.33                80
 08/03/2017   22:24:02   (   0.26,-134.58) (   0.28,-134.40)   20.16                80
 08/06/2017   10:24:27   (  -0.27,-134.43) (  -0.09,-135.14)   81.09                80
 08/07/2017   10:08:23   (  -0.26,-134.38) (  -1.12,-130.61)  429.57                80
 08/08/2017   22:27:40   (   0.28,-134.33) (  -0.09,-135.92)  181.97                80