Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 1 13.  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)
 01/21/2017   16:38:29   (  80.90,-121.58) 01/21/2017   16:39:44  (  80.92,-121.39)    3.90                75
 01/21/2017   17:29:33   ( -80.91,  46.21) 01/21/2017   17:30:28  ( -80.91,  46.17)    1.03                55
 01/21/2017   18:20:29   (  80.92,-146.43) 01/21/2017   18:21:13  (  80.90,-146.45)    1.22                44
 01/21/2017   19:11:35   ( -80.91,  20.62) 01/21/2017   19:11:58  ( -80.91,  20.74)    2.21                23
 01/21/2017   20:02:31   (  80.91,-172.02) 01/21/2017   20:02:43  (  80.91,-171.87)    2.69                12
 01/21/2017   20:53:36   ( -80.92,  -4.60) 01/21/2017   20:53:28  ( -80.91,  -4.68)    1.39                 8
 01/21/2017   21:44:32   (  80.92, 162.76) 01/21/2017   21:44:13  (  80.91, 162.70)    1.44                19
 01/21/2017   22:35:38   ( -80.92, -30.20) 01/21/2017   22:34:58  ( -80.91, -30.10)    1.73                40
 01/21/2017   23:26:34   (  80.92, 137.17) 01/21/2017   23:25:43  (  80.91, 137.28)    2.06                51