Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2015 5 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)
 06/01/2015   00:38:47   (  81.02, 118.17) 06/01/2015   00:39:55  (  81.02, 118.22)    1.09                68
 06/01/2015   01:29:44   ( -81.02, -74.51) 06/01/2015   01:30:40  ( -81.02, -74.55)    0.62                56
 06/01/2015   02:20:49   (  81.02,  92.91) 06/01/2015   02:21:25  (  81.02,  92.80)    2.03                36
 06/01/2015   03:11:47   ( -81.02,-100.15) 06/01/2015   03:12:10  ( -81.02, -99.97)    3.19                23
 06/01/2015   04:02:52   (  81.02,  67.28) 06/01/2015   04:02:55  (  81.02,  67.38)    1.65                 3
 06/01/2015   04:53:49   ( -81.02,-125.41) 06/01/2015   04:53:40  ( -81.02,-125.39)    0.55                 9
 06/01/2015   05:44:54   (  81.02,  42.03) 06/01/2015   05:44:25  (  81.02,  41.96)    1.36                29
 06/01/2015   06:35:50   ( -81.01,-150.29) 06/01/2015   06:35:09  ( -81.01,-150.44)    2.58                41
 06/01/2015   07:26:56   (  81.01,  16.77) 06/01/2015   07:25:54  (  81.01,  16.90)    2.35                62