Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2015 7 21.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-19) NOAA-19 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/23/2015   17:07:59   ( -81.04,  50.25) 07/23/2015   17:09:02  ( -81.04,  50.11)    2.50                63
 07/23/2015   17:58:58   (  81.04,-142.44) 07/23/2015   17:59:46  (  81.03,-142.31)    2.25                48
 07/23/2015   18:50:01   ( -81.03,  24.96) 07/23/2015   18:50:31  ( -81.03,  25.04)    1.49                30
 07/23/2015   19:41:00   (  81.03,-167.73) 07/23/2015   19:41:16  (  81.03,-167.75)    0.33                16
 07/23/2015   20:32:03   ( -81.03,  -0.32) 07/23/2015   20:32:01  ( -81.03,  -0.39)    1.19                 2
 07/23/2015   21:23:02   (  81.03, 166.98) 07/23/2015   21:22:46  (  81.04, 166.82)    2.85                16
 07/23/2015   22:14:06   ( -81.03, -25.98) 07/23/2015   22:13:31  ( -81.03, -25.82)    2.77                35
 07/23/2015   23:05:04   (  81.03, 141.69) 07/23/2015   23:04:15  (  81.02, 141.76)    1.30                49