Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2018 4 27.  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)
 05/01/2018   01:05:21   (  80.58, 117.65) 05/01/2018   01:06:27  (  80.57, 117.62)    1.30                66
 05/01/2018   01:56:21   ( -80.59, -75.02) 05/01/2018   01:57:12  ( -80.57, -75.07)    1.77                51
 05/01/2018   02:47:22   (  80.59,  92.22) 05/01/2018   02:47:57  (  80.58,  92.22)    1.28                35
 05/01/2018   03:38:22   ( -80.59,-100.45) 05/01/2018   03:38:42  ( -80.58,-100.48)    1.70                20
 05/01/2018   04:29:23   (  80.59,  66.79) 05/01/2018   04:29:27  (  80.58,  66.81)    1.47                 4
 05/01/2018   05:20:23   ( -80.59,-125.87) 05/01/2018   05:20:12  ( -80.58,-125.88)    1.75                11
 05/01/2018   06:11:24   (  80.59,  41.35) 05/01/2018   06:10:57  (  80.58,  41.41)    1.81                27
 05/01/2018   07:02:24   ( -80.60,-151.30) 05/01/2018   07:01:42  ( -80.58,-151.28)    1.90                42
 05/01/2018   07:53:25   (  80.60,  15.92) 05/01/2018   07:52:27  (  80.58,  16.00)    2.23                58